March 7, 2023

Speaker: Gwen Rudie (Carnegie Observatories)

Contact Information: gwen@carnegiescience.edu

Title:  Feedback and Feeding: The Circumgalactic Medium of Galaxies from Cosmic Noon to the Present Day

Abstract: The exchange of baryons between galaxies and their surrounding intergalactic medium (IGM) is a crucial but poorly constrained aspect of galaxy formation and evolution. I will present results from the Keck Baryonic Structure Survey (KBSS) and the Cosmic Ultraviolet Baryon Survey (CUBS), two spectroscopic surveys designed to explore the evolution of galaxies and their surrounding intergalactic and circumgalactic baryons during the height of cosmic star formation and its decline to present day. Analysis of KBSS and CUBS QSO sightline data constrain the thermodynamics, kinematics, and chemistry of the CGM over the majority of the Universe's history and four decades of galaxy luminosity, providing direct constraints on gas flows in and out of galaxies. I will highlight results on the size, kinematics, and thermal properties of circumgalactic gas at z~2 and the multi-elemental chemical abundances of the intermediate redshift CGM. Collectively, these data demonstrate the CGM provides one of the best testing grounds for models of galaxy-scale outflows. 

Visitor's room: Room 111A

Visit Schedule:

Tuesday (7 Mar. 2023):

• 9:30 a.m.:  

• 10:00 a.m:  Eliot

• 10:30 a.m.:  

• 11:00 a.m.: Colloquium 

• 11:30 a.m.: Colloquium 

• 12:00 p.m.: Bahcall lunch

• 12:30 p.m.: Bahcall lunch

• 1:00 p.m.: Bahcall lunch

• 1:30 p.m.: Jim Gunn

• 2:00 p.m.: Tea Time with Grad Students in Grand Central

• 2:30 p.m.: Tea Time with Grad Students in Grand Central

• 3:00 p.m.: Ivanna Escala

• 3:30 p.m.:

• 4:00 p.m.: Rajsekhar Mohapatra

Dinner Sign-up - add your name here:

Monday Joint Dinner  (6 Mar. 2023)

1. PU Faculty Host: Jenny Greene

2. PU Postdoc Host: Ivanna Escala

3. PU: Yilun Ma

4. PU: Jiaxuan Li

5. IAS Host: Hsiang-Chih Hwang

6.  IAS: Chris Hamilton

7.  IAS: Sihao Cheng

8.  IAS: 

STUDENTS HAVE PRIORITY.

PLEASE NO MORE THAN 8 PEOPLE (it is more difficult to properly interact with the speaker in larger groups).