Speaker
Description
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 an analysis of a large sample of Coma cluster galaxies observed by SDSS. Their star formation histories are inferred using two spectral fitting codes, pPXF (Penalized PiXel-Fitting) and BESTA (Bayesian Estimator for Stellar Population Analysis), for comparison and verification. Using a cosmological N-body simulation, orbital parameters such as the time of infall and the time of the first pericentric passage are obtained. By cross-matching these two histories in phase space, I aim to gain perspective on the stellar masses formed before infall, as well as whether galaxies continue to form stars around their first pericentre or have been quenched instead.
| Talk category | Plenary |
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