Astronomy & Astrophysics Seminar: Modeling the Circumgalactic Medium or How I Learned to Stop Worrying and Love Multiphase Gas

Zoom: https://tau-ac-il.zoom.us/j/82693800844

Abstract:

Multiwavelength observations from the last decades reveal the existence of extended multiphase gas around galaxies from the local to the high redshift Universe. Due to the challenging nature of the measurements, many questions remain open - how much gas is out there, what are its thermal properties, spatial distribution, and morphology? These are linked to the properties of gas accretion onto galaxies, star formation, and feedback processes, and are important to our understanding of galaxy evolution.

I will present a modeling framework developed to address these questions. In the first part, I will describe models for the warm/hot CGM and show what we learned from applying them to observations of MW-mass galaxies. In the second part, I will share results from recent work on the cool, photoionized phase of the CGM, addressing the gas mass, amount of non-thermal support, and cloud sizes. Finally, I will discuss predictions for upcoming observations and future facilities (including ELT, HabEx, Athena, and more), which will allow us to test and improve our understanding of the physical processes governing the CGM.
 

Seminar Organizer: Prof. Dan Maoz