5 min - SRON
5 min - KNA-RNAS
5 min - LOC
We present our ongoing development of radio astronomy instrumentation and the science drivers behind it. Two examples of our work include L‑FIRE (Low‑Frequency Interferometric Radio Explorer), a concept for a distributed radio telescope in low Earth orbit, and contributions to the DEX (Dark Ages Explorer) lunar radio telescope concept. We analyse how our targeted science cases shape the...
The discovery of gravitational waves has transformed astrophysics, enabling the study of the Universe in a fundamentally new way. The next major breakthrough is expected with the launch of the European Space Agency’s Laser Interferometer Space Antenna (LISA) in the mid-2030s. By opening the millihertz gravitational-wave window, LISA will access a rich population of astrophysical and...
Unintended electromagnetic radiation (UEMR) from large Low Earth Orbit satellite constellations poses a growing threat to radio astronomy. First identified with the Low Frequency Array (LOFAR), this weak but persistent emission from onboard electronics can be broadband and difficult to mitigate, yet is strong enough to contaminate sensitive observations.
Follow-up measurements with other...
The modeling of stars and stellar populations is a key element in our understanding of the Universe, and plays a large role in the scientific exploitation of observations as astronomy moves into the big data era. However, despite the identification of the key processes and fundamental equations that drive stellar evolution almost a century ago, and the broad availability of numerical methods...
We have just passed the 10th anniversary of the first-ever gravitational-wave detection. With more than 150 detections of merging binary black holes (and counting), gravitational-wave observations have entered the ‘population era’. The data already reveal a rich structure in the black hole mass function. However, for the first time, we have now obtained enough detections to begin identifying...
Primordial systems are unique archeological sites, commonly hidden within vast observational datasets yet offering invaluable insights into the story of our Universe. In this talk, I will briefly present my current work applying deep learning techniques in searching for two kinds of (potentially) primordial systems — (1) low-metallicity dwarf galaxies and (2) Lyman limit deuterium systems....
Jupiter’s famous banding reflects powerful jet streams that probe deep atmospheric and interior processes. Since arriving in 2016, NASA’s Juno spacecraft, in a series of close, polar perijove passes, has returned high-precision gravity measurements from its Gravity Science experiment (tracking Doppler shifts of the spacecraft), alongside complementary data from the Microwave Radiometer and...
To understand the origin of heavy elements, it is crucial to understand early star-forming activity. Observations with the James Webb Space Telescope have unveiled more early galaxies than expected, highlighting the need for complementary tracers of obscured star-formation in the early Universe.
(Sub)millimetre spectroscopy provides direct access to dust emission and far-infrared...
Several extragalactic Fast X-ray transients (FXTs), detected as bursts of soft X-ray photons with durations of hundreds of seconds by the Einstein Probe mission, have recently been linked to the collapse of a massive star. For those FXTs, the ensuing supernovae are similar to those associated with long gamma-ray bursts (long-GRBs). Under the fireball model for long-GRBs, the collapse of a...
In the last 15 years, the Atacama Large Millimeter/submillimeter Array
(ALMA) has revolutionized astrophysics by providing unprecedented
resolution and sensitivity for observing the cold Universe. However, in
another 15 years from now, the scientific landscape will have changed
dramatically as major new facilities come online, and ALMA itself will
approach its fourth decade of operation....
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous ingredients of the interstellar medium where they contain 15 to 20% of all the carbon and play a crucial role in the ionization balance and gas heating (Tielens et al., 2008). PAHs produce bright emission spectral features called the Aromatic Infrared Bands (AIBs), which are detected in great detail thanks to the exquisite spectral...
The missing baryons, that is, the yet-unobserved ordinary matter in the large-scale structures of the Universe, have been shown by simulations to reside mostly in filaments of the cosmic web. As this phase of the cosmic gas is becoming observable, currently in the outskirts of galaxy clusters and in short filaments, so-called bridges, it is becoming crucial to understand their detailed gas...
We investigate a dust-driven vertical shear instability (DVSI) in a radially local, vertically stratified isothermal shearing box. Unlike the classical vertical shear instability, which relies on baroclinicity from global thermodynamic gradients (radial temperature gradients with finite cooling), DVSI is triggered by dust backreaction that generates axisymmetric vertical shear in an otherwise...
NICER has enabled mass–radius inferences for pulsars using pulse profile modeling (PPM), providing constraints on the equation of state (EOS) of cold, dense matter. To date, PPM and EOS inference have been carried out as two separate steps, with the former using EOS-agnostic priors. This approach has several drawbacks. Ideally, one would perform a fully hierarchical Bayesian inference where...
We present a morphological analysis of dwarf galaxies in the Perseus cluster using Euclid Early Release Observations (ERO), exploiting the VIS instrument's diffraction-limited resolution and exceptional surface brightness sensitivity. Working from the ~1100-dwarf ERO catalog of Marleau et al. (2025), we develop a novel cumulative light fraction approach for measuring isophotal shapes in low...
Since the launch of the X-ray satellite Einstein Probe (EP) in 2024, we have finally been able to constrain the origins of several fast X-ray transients (FXTs). Astrophysical transients are known across, and beyond, the whole electromagnetic spectrum, including gamma-ray bursts (GRBs) and gravitational waves. But for long our knowledge on the progenitors of FXTs remained poor. Now that we are...
Atmospheric boundary conditions play a critical role in interior modeling, as they define the interior adiabat and strongly influence the inferred planetary radius for a given interior structure. For hot Jupiters, their extended and highly irradiated atmospheres enable detailed observational constraints on atmospheric composition, now reaching unprecedented quality with JWST and ground-based...
The discovery of the phase space spirals in the Solar neighborhood in Gaia Data Release 2 has prompted various attempts to understand their origin. A source of bending waves, which has been neglected as a cause of the phase spiral, is irregular gas inflow along the warp.
We aim to study whether perturbations by the gas warp could induce phase spirals. Accounting for this additional formation...
In the past decade, black holes evolved from a theoretical prediction by General Relativity to actually observable objects. In particular, accretion and outflow of plasma leave key signatures across the electromagnetic spectrum, from the Event Horizon Telescope radio observations to X- and γ-rays, from the shadow size to the shape of the spectral energy distribution (SED). These signatures...
We present the development of a resistive-MHD (RMHD) module within the ideal-GRMHD code GRaM-X. GRaM-X (General Relativistic accelerated Magnetohydrodynamics on AMReX) is a new, GPU-accelerated, dynamical-spacetime ideal-GRMHD code that extends the capabilities of the Einstein Toolkit to GPU-based exascale platforms. It features three-dimensional adaptive mesh refinement (AMR) on GPUs through...
The extended hot ($T=10^6$ K) gas phase of the circumgalactic medium (CGM) is an essential component for studying the baryon cycle of late-type galaxies, because it could supply the galaxy with gas to sustain star formation and possibly contains many of the 'missing' baryons.
Using a simple semi-analytic model based on hydrostatic equilibrium and the latest eROSITA observations, we evolve the...
The Class I protostellar stage is a critical phase early in stellar evolution, where a rotating disk of gas and dust is formed, setting the chemical budget for the formation of planets. However, unlike the slightly older Class II disks, Class I protostars are deeply embedded in their natal envelopes. With the coverage, sensitivity and spectral resolution of the JWST, we are now capable of...
In the interstellar medium, multiple processes in star formation and
evolution deposit, clear, and reorganize dust molecules around stellar
populations. In the Physics at High Angular Resolution in Nearby
Galaxies (PHANGS) surveys, stellar associations trace loosely bound
young stars in recent star formation sites. Leveraging the synergy
between HST and JWST, we measure dust extinction of...
Ultraluminous X-ray sources (ULXs) can be considered for the most part an extreme version of X-ray binaries accreting at super-Eddington accretion rates. The most extreme manifestation of this process, other than their abnormally bright X-ray luminosities ($L_\mathrm{X} \gtrsim 10^{39}$ erg/s) occurs in the form of hundred-parsec nebulae of ionized gas surrounding them, offering a nearby...
Massive stars are fundamental drivers of cosmic evolution, shaping the interstellar medium, enriching galaxies with heavy elements, and producing compact remnants. A large fraction reside in binary or higher-order multiple systems, with most undergoing interaction during their lifetimes, profoundly altering their evolution and final outcomes. Understanding the physics of binary interaction is...
Most of the visible matter in the universe exists as highly ionized plasmas, consisting of highly charged ions (HCIs). Due to their high effective nuclear charge, HCIs strongly emit radiation in the X-ray regime and can be observed with X-ray satellites, such as XRISM.
To study these ions in a laboratory setting and establish spectral benchmarks that meet the accuracy requirements of XRISM...
The Cherenkov Telescope Array Observatory (CTAO) will be the next-generation ground-based facility for very-high-energy gamma-ray astronomy. In contrast to space-based instruments, ground-based gamma-ray observatories detect the brief flashes of Cherenkov light produced when high-energy gamma rays interact with the Earth’s atmosphere, generating particle cascades. This technique enables the...
This will be a talk in two parts.
In the first part I will given an overview of the European Southern Observatory, its capabilities (VLT, ALMA, VLTI, La Sila) and current developments, including the construction of the Extremely Large Telescope where The Netherlands plays an important role, among others through the METIS, Micado and MOSAIC instruments.
In the second part I will give an...
Current high-contrast imaging instruments are limited by wavefront errors originating from non-common path aberrations due, for example, to manufacturing errors in the optics and temperature drifts in the system. These create quasi-static speckles in the final science image that are difficult to distinguish from companions. The Self-Coherent Camera (SCC) exploits the light incoherence between...
NOVA’s instrumentation program is driven by scientific ambition: the need for access to specific data shapes our participation in major international projects. With a strong focus on ESO facilities, NOVA aims both to contribute to future instruments and to sustain and develop key technical expertise within its instrumentation groups.
As ESO prepares for the post-2030 landscape through the...
After more than 30 years of talking, the construction of the Square Kilometre Array (SKA) is now well underway. In this talk, I will give a update on construction, science verification, and what this stage of project development means for the Dutch astronomy community. In particular, I will focus on the establishment of our own regional centre, and its expected role in the community. NAC is...
iDaVIE (immersive Data Visualisation Interactive Explorer) is a software tool developed at IDIA (Institute for Data Intensive Astronomy) in Cape Town (https://idavie.readthedocs.io/en/v1.1/). It allows viewing, manipulation and analysis of 3D data in a Virtual Reality setting where one is immersed in the 3D data environment.
There are two versions of iDaVIE. iDAVIE-v allows viewing of 3D...
In a 2021 study on Dutch traditional media, “plasma physics” was found to be the lowest represented topic amongst news articles discussing physics, at only 0.4%[1]. In contrast, “astronomy and astrophysics” (a topic overlapping with plasma) had over 100 times more representation with 44.4%. Poor science communication representation has led the general public to be unaware of technological...
The outflows of massive stars significantly affect their stellar evolution and surroundings. The mass-loss rates of these stars is thus essential to constrain from their stellar spectra. However, this requires the detailed spectroscopic analysis of large samples of stars. Precisely modelling the wind and atmospheres of massive stars is computationally very expensive, which severely limits the...
We present a new method for fast inference of pulsar emission and interstellar medium (ISM) parameters directly from frequency-resolved pulse profiles. Accurate parameter estimation is challenging due to strong degeneracies, and classical Bayesian likelihood-based fitting becomes computationally expensive for high-dimensional parameter spaces.
We build a physically motivated simulator that...
With the boom of applications of deep neural networks in (astronomical) research, we have grown an urgent need to crack open our own black boxes, lest our reviewers start asking us difficult questions we cannot answer. Enter the field of "explainable AI" (XAI), in which methods to solve this issue are developed and studied. I will give a short introduction into XAI in general, and present our...
We investigate the impact of stellar cluster initial conditions on the dynamical evolution of planetary systems. Two configurations are considered; a sub-virial fractal distribution and a virialised Plummer distribution. Both models are initialised with a virial radius of $0.5$pc, $150$ stars and $~145$ planetary systems. Five realisations of each configuration are performed with identical...
Cassiopeia A (Cas A), the youngest known core-collapse supernova remnant (SNR) in the Milky Way, offers an unparalleled view of the explosions of massive stars. A >350 ks observation with XRISM has delivered an unprecedented high–spectral-resolution X-ray view of this archetypal remnant and produced the mission’s most productive dataset to date, with 5+ published papers. In this talk, I will...
To understand how galaxies form and evolve, we must first contend with dust. Though it makes up only a tiny fraction of a galaxy's mass, interstellar dust acts as a cosmic veil, absorbing starlight and re-emitting it at longer wavelengths. This process, known as attenuation, significantly alters the spectra we observe with instruments like JWST. Until now, large-volume cosmological simulations...
The sizes of galactic disks are known to depend on stellar mass and redshift, with galaxies of a given mass expected to be more compact at higher redshifts. However, observational studies have uncovered disk galaxies at z~3 that have sizes significantly larger than expected from the mass-size relation. Notably, these ‘giant disks’ are preferentially found in proto-clusters, suggesting that...
The Square Kilometre Array (SKA) is a next-generation radio telescope currently under construction in South Africa and Australia.
Its low-frequency part (50-350 MHz), located in Australia, features nearly 60,000 antennas in a core region of about 1 km diameter.
The unprecedented antenna density allows to observe individual cosmic-ray air showers to a level of detail no other observatory can...
In order to understand star-forming processes in dusty star-forming galaxies, observations of dense gas tracers, such as HCN, HCO+ and HNC, are required to link existing studies of their molecular gas, typically traced via CO or [CII], and obscured star formation, traced via the dust continuum. Previous studies suggest that high-z DSFGs could be surprisingly lacking in dense gas for sources...
Fast radio bursts (FRBs) are millisecond-duration, extragalactic radio transients of unknown origin. The FRB backend on the CHIME telescope (CHIME/FRB) is the most prolific FRB discovery machine, having detected more than 4000 unique sources of FRBs. The recent addition of three CHIME Outrigger stations across Northern America enables the precise sub-arcsecond localization of multiple FRBs per...
The interpretation of exoplanet spectra obtained with JWST typically assumes that observed atmospheres are in steady state. In this work, we challenge that assumption by demonstrating that stellar flares can induce rapid and long-lasting changes in atmospheric composition that directly impact observables. We model the effects of recurrent stellar flaring on metal-rich exoplanet atmospheres...
Galaxy mergers represent a critical and complex phase in galaxy evolution, often triggering nuclear activity and intense episodes of central star formation that can profoundly influence the subsequent evolution of the system. In this talk, I present new insights into the impact of active galactic nucleus (AGN) feedback on the multi-phase interstellar medium (ISM) in the central region...
The future of very low frequency radio astronomy lies on the Moon, where the absence of an ionosphere and terrestrial radio interference enables observations below ~30 MHz. The upcoming LuSEE-Night mission will deploy four monopole antennas on the lunar farside to measure the global signal from the Epoch of Reionization and coherent emission from exoplanets. Before scientific measurements are...
H$\alpha$ emission is abundant in ultracool dwarfs (UCD), but its origin is unclear. While it may stem from residual star-like, chromospheric emission, it may also be attributed to planet-like magnetospheric emission akin to Jupiter's aurora. A way to resolve this issue is to measure the spatial distribution of H$\alpha$ emission on the UCD. Chromospheric emission would appear distributed in...
4U 1556-60 is an X-ray binary that was discovered more than 50 years ago as a persistent X-ray source. However, very little was known about it, including fundamental properties such as its distance, whether the accreting compact object was a black hole or neutron star, and its orbital period. Recently, Gaia Data Release 3 has provided a parallax for the optical counterpart of 4U 1556-60,...
We present the discovery of an extraordinary overdensity around a source of the ALMA Large Program REBELS at z=7.35, among the most extreme proto-clusters known beyond z>7. Within just 21″×21″ (Δz<0.01), we identify 5 sources in [OIII]5007 with NIRCam/Grism observations, also showing in ALMA data as 4 of the brightest [CII] 158μm emission known at z>7. The properties of these galaxies show...
GRS 1915+105, the low mass X-ray binary with the largest accretion disk and the first microquasar observed with superluminal jets, has stayed in a high-luminosity outburst for decades since its discovery in 1992. However, in mid 2018, the source entered a new phase in which the X-rays suddenly dropped to an unprecedentedly low flux that was quickly followed by a rebrightening in the radio,...
We present the first large-scale statistical analysis of an extensive catalogue of interplanetary Type III solar radio bursts compiled through human participation. The catalogue is based on Radio and Plasma Waves (RPW) observations from Solar Orbiter, collected through the citizen-science campaign Solar Radio Burst Tracker hosted on Zooniverse, with contributions from 867 volunteers between...
On August 31st, 2024, the LOFAR radio telescope paused after 15 years of operations to undergo a major upgrade. In this upgrade, our lessons learned from that period are incorporated into new hardware, firmware, and software. Except for the antennas, almost everything is being replaced as we build LOFAR2.0: receiver units, digital beam formers, clock distribution, network infrastructure, the...
The mechanics of binary evolution remain largely invisible other than the luminosities that reach us. However, these luminosities are the end result of a chain of interdependent feedback processes spanning the entire binary system to accrete material from a still-evolving donor star. With recent developments a clear picture of this mass transfer is now possible. Only by tackling system...
The large-scale structure of the Universe encodes a wealth of information about cosmology and galaxy formation. For decades, two-point correlation functions have served as a cornerstone of this effort, distilling the complex distribution of matter into powerful statistical measures. These summary statistics underpin precision constraints on the standard cosmological model and provide key...
Water (H$_2$O) is key for habitability, but the delivery mechanism to (forming) planets is not yet well understood. The James Webb Space Telescope, especially through the MIRI instrument, can now study the planet-forming regions (inner few au) of disks around young stars. Hundreds of ro-vibrational (<10 $\mathrm{\mu}$m) and pure rotational (>10 $\mathrm{\mu}$m) transitions can probe the...
Fast radio bursts (FRBs) are among the most mysterious and exciting phenomena in modern astrophysics. These are extremely energetic bursts originating from extragalactic distances, providing unique probes of the intergalactic medium and offering new ways to study the universe at cosmological scales. Despite major progress in recent years, many questions remain open about their origins,...
Fast Radio Bursts (FRBs) are rapidly becoming unparalleled cosmological tools: the dispersion of these millisecond-duration bursts traces the ionised material along the line of sight, while scattering and Faraday rotation encode the turbulence and magnetic field of intervening media. Nowadays, with more than a hundred FRBs localised to their host galaxies at increasing redshifts, they offer a...
Current and planned X-ray telescopes have imaging resolutions on the order of arcseconds or worse, which exceeds the theoretical diffraction limit by four orders of magnitude. By leveraging a compact, single-spacecraft design, X-ray Interferometry (XRI) can achieve an EHT-like spatial resolution of tens of microarcseconds.
This enormous leap in resolution allows for direct imaging of...
Long-period transients (LPTs) were discovered a few years ago as mysterious radio sources that produce bright pulses that repeat on periods of minutes to hours. While they have been suggested to be extremely slow magnetars or white dwarf binaries, conclusively determining their origins has been complicated by their large distances and high extinction, which make follow-up at other wavelengths...
Understanding the Epoch of Reionisation remains one of the pivotal tasks for modern cosmology, and next-generation telescopes such as EUCLID and JWST are opening up the path to the first precision constraints on reionisation derived from the Lyman-alpha damping wing signature imprinted by the foreground neutral intergalactic medium (IGM) on the spectra of high-redshift quasars.
We developed...
Detection of auroral radio emission from exoplanets presents a unique opportunity to directly probe their magnetic fields. By studying the magnetic characteristics of exoplanets, we can better-understand their atmospheric retention, long-term evolution, and ultimately their habitability. However, an unambiguous detection remains elusive, largely due to limited sensitivity at low radio...
Local scaling relations of disc galaxies contain key information on the different physical processes that regulate their formation and evolution. While these relations are well established at z=0, their physical origin and evolution across cosmic time remain poorly constrained.
We present a new and unique radially resolved semi-analytic model for the evolution of star-forming disc galaxies,...
Fast X-ray transients (FXTs) are singular bright bursts of X-rays. The Einstein Probe (EP) satellite, launched in 2024, is revolutionising the field thanks to its timely discoveries and precise localizations of the events. These newly discovered FXTs have a strong connection with gamma-ray bursts (GRBs), which comes from the emission of a relativistic jet pointing towards us.
It seems that...
Sgr A* displays intermittent IR and X-ray flaring, possibly due to regions of magnetic reconnection near the event horizon. While this mechanism is favored by both phenomenological modeling and simulations, such methods rely on simplified expressions of the radiating electrons’ energy distribution to model the resulting multiwavelength emission. Rather than this approach, we introduce a new...
The GUSTO mission aims to unravel the life cycle of interstellar gas in the Milky Way and Large Magellanic Cloud (LMC), tracing the formation and destruction of star-forming clouds, probing the dynamics of the Galactic Center, and exploring the interplay between star formation, stellar feedback, and the structure of the interstellar medium. By mapping [CII] and [NII] emission, GUSTO provides...
The physical state of a star is primarily determined by its initial mass and chemical composition, while other factors (e.g. rotation, magnetic fields, companion) play a secondary role. Precise stellar masses are therefore fundamental for constraining stellar structure and evolution (SSE), particularly for rapidly evolving stars more massive than ~1.2 solar masses (i.e. OBAF-type stars)....
Massive star formation is thought to occur within the Galactic disk, so the presence of massive stars at a Galactic height of more than a kiloparsec is unexpected given their short lifetime. Using the Alma Luminous Star (ALS) III catalogue (Pantaleoni González et al. 2025) and Gaia DR3 data, we determined the scale height of Galactic OB candidate stars (64±4 pc) and identified 90 luminous...
The discovery of gravitational waves (GWs) has revolutionized our understanding of the Universe, providing a unique observational window into cosmic phenomena. Active Galactic Nuclei (AGN) are promising sites for the formation of binary black holes (BHs).
In this scenario, the so-called AGN channel, BHs from the galactic nucleus gradually align with the AGN accretion disk, forming a dynamic...
Type-I X-ray bursts in neutron star (NS) low mass X-ray binaries are highly energetic events with the power to dynamically change the accretion flow. Studying such dynamical effects is a powerful new method that could shed light on accretion disk physics, coronae and the origin of relativistic jets. Correctly modelling time resolved X-ray spectra during these bursts allows for measurements of...
We use the TNG300-1-Dark simulation to investigate the spin bias of low-mass halos and its connection to the strong clustering of ultra-diffuse galaxies (UDGs) reported by Zhang et al. (2025). By comparing two halo spin definitions—one using only bound particles ($\lambda_{\rm b}$) and another including unbound particles ($\lambda_{\rm a}$)—we demonstrate that the spin bias of low-mass halos...
Circumbinary planets (CBPs), planets orbiting binary star systems, offer unique insights into planet formation. However, they are challenging to detect using traditional methods. While photometric surveys such as Kepler and TESS have led to the discovery of around a dozen transiting CBPs, the majority of these systems lack precise mass measurements due to limitations of transit-based methods....
We are currently at the dawn of a new era in multi-messenger astrophysics. Imaging air-Cherenkov telescopes such as MAGIC, H.E.S.S., and VERITAS have already detected around 90 active galactic nuclei (AGN) at TeV energies, while neutrino observatories like IceCube and KM3NeT have identified several high-energy neutrinos likely associated with AGN. A key open question remains: where in the jet,...
Radio waves emitted by pulsars experience a frequency-dependence propagation effect caused by free elections in the ionized interstellar medium (IISM), parameterized by the dispersion measure (DM). Temporal variations in the DM of pulsars provide a powerful probe of the density fluctuations of the free electrons in the ionized interstellar medium. These variations provide insight into the...
The Near-Ultraviolet eXplorer (NUX) is a proposed ground-based observatory that will operate at 300-350 nm to survey fast, hot transient sources. At the moment, its scientific and technical feasibility is being tested with a prototype system called Proto-NUX. The main purpose of Proto-NUX is to find the atmospheric throughput and variability in the 300-350 nm band, and to determine the...
In 2020 the sustainability committee of the Dutch Astronomy Council published an inventory of CO2 impact of astronomy in 2019. In the strategic plan for astronomy 2021-2030 a significant reduction of the CO2 impact was announced. We present an update on the CO2 emissions of Dutch astronomy, in particular related to air travel and discuss this in the context of the announced CO2 reductions.
Just over a decade ago the first X-ray pulsations were discovered in an Ultraluminous X-ray source (ULX), revolutionizing our understanding of these systems. The detection of pulsations showed at least some ULXs offer us ideal laboratories to study the most extreme manifestation of accretion onto neutron stars (NSs), even if the number of NS-ULXs within the ULX population remains uncertain....
Black hole low-mass X-ray binaries (BH LMXBs) are transient sources which spend most of their lifetime in quiescent states. Once or twice a year they are characterised by bright outbursts that last for days to months, during which accretion flow, compact jets and discrete ejecta undergo significant evolution. These relatively short outburst timescales make BH LMXBs ideal natural laboratories...
Fast radio bursts (FRBs) are millisecond-duration radio transients of extragalactic origin whose progenitors and emission mechanism(s) remain mysterious. Of the ~4000 FRBs discovered to date, only ~100 repeat, raising the question of whether repeating and apparently non-repeating FRBs arise from the same underlying population.
I present recent milliarcsecond localisations of FRBs that...
It is well known that dense environments like clusters play a role in galaxy evolution, showing an increase in quenched galaxies with an increase in density. However, the exact mechanisms involved in quenching these galaxies are not well understood, and there is also evidence indicating that some galaxies experience preprocessing before falling into the cluster. To investigate this, I present...
