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Physics Colloquium: Stephanie Ho
February 28 | 4:00 pm - 5:00 pm
Title: Understanding the Galaxy Ecosystem: Gas Flow in The Circumgalactic Medium
Abstract: The reservoir of baryons and metals surrounding galaxies is known as the circumgalactic medium (CGM). The CGM plays a crucial role in the growth of galaxies; galaxies require a continuous gas supply to sustain star formation, and this gas accretion process is regulated by feedback from newly formed stars. However, observational analysis of the CGM is challenging. Not only because the low gas density makes the CGM difficult to image directly, but the CGM also consists of gas structures of different temperatures and densities. We will discuss recent efforts of studying the multiphase circumgalactic gas flow. We will also present analyses from cosmological simulations and explain the observational bias that potentially affects the interpretation of observed data. We will discuss how future telescope facilities can overcome some of the observational challenges and create exciting opportunities for future work on understanding the galaxy gaseous ecosystem.
Host: Rongmon Bordoloi