Speaker
Description
In June 2023, International Pulsar Timing Array (IPTA) collaborations in Europe, America, India and Australia simultaneously announced the first compelling evidence of the low-frequency (nHz) gravitational wave background. This was a milestone in gravitational wave astronomy. These results were further strengthened by detailed comparative analysis at the IPTA level. The main source of noise in the PTA data set is the time variations of the Dispersion Measure (DM) caused by the propagation of the pulsar signal through the turbulent intervening interstellar medium and the solar wind. The European interferometers LOFAR and NenuFAR, operating below ~240 and ~100 MHz respectively, provide the most sensitive constraints of DM variations. In this talk, I will present state-of-the-art results from the IPTA and showcase the importance of LOFAR and NenuFAR in improving precision and boosting sensitivity to the gravitational wave background. I will place these results in the context of the upcoming third data release of the International Pulsar Timing Array, which will provide the most sensitive detection of the gravitational wave background to date.
| Talk category | NOVA Network 3 |
|---|---|
| Preference for a talk or poster | Talk |
