IISER MOHALI

Abstract: In the hierarchical structure scenario formation, galaxiesgrow via mergers and by accreting cold gas along cosmic filaments. Onthe other hand, non-axisymmetric structures such as spiral arms, barsdrive the long-term (secular) evolution in disc galaxies. Theseprocesses leave characteristic morphological and kinematic fingerprints,and excavating these fingerprints holds the key to unravel the detailedevolutionary pathways of galaxies. The Milky Way (which harbours bothspiral arms and a stellar bar), plays a pivotal role in decoding theevolutionary pathway of disc galaxies. Empowered with the European SpaceAgency's Gaia mission, the Milky Way offers a unique opportunity tocarry out detailed photometric, spectroscopic, and dynamical studies onan individual star-by-star basis, in a way that is impossible forexternal galaxies. On the other hand, the recent observations ofhigh-redshift galaxies (z ~ 1-3), as unveiled by JWST offer vital cluesof galactic dynamics in the earlier universe. With this plethora ofinformation in hand, the time is ripe to tackle the long-standingpuzzles of galaxy evolution over cosmic time.In this talk, I will explain some of the kinetic structures in thephase-space distribution of stars in the Solar vicinity and beyond (asunveiled by Gaia), and how understanding their origin can potentiallylead to a better understanding of the Milky Way’s evolution over cosmictime. I will further explore how understanding the recent JWSTobservations of high-redshift galaxies by means of numerical simulationscan be instrumental in gaining an overall understanding of evolution ofdisc galaxies in the last 8-10 billion years.\n\nMeeting ID: 997 4043 6993\nPasscode: 920741\n