October 26, 2021

Speaker: Ellen Zweibel (in-person)

Contact Information: zweibel@astro.wisc.edu

Title: Implications, Tests, and Unsolved Problems in Cosmic Ray Feedback

Abstract: Cosmic rays, the relativistic component of diffuse astrophysical plasma, exchange energy and momentum with the thermal gas collisionlessly, mediated by the ambient magnetic field. Some but not all models of this interaction show that cosmic rays can drive outflows, heat the gas, and reduce the star formation rate in galactic disks. I will probe the properties of these models and their implications on small scales, discuss consequences that may be observable, and highlight a few unsolved problems.

Visitor's Room: 125

Visit Schedule:

Wednesday (27 Oct 2021):

  • Meet Sarah in Peyton 104 to collect visitor office key

  • 10:00 a.m.: Amitava Bhattacharjee (Peyton 003)

  • 10:30 a.m.: Astro Coffee (virtual daily astro-ph discussion, https://princeton.zoom.us/j/9425976037) or Break

  • 11:00 a.m.: Jeremy (Peyton 129)

  • 12:00 p.m.: Wunch (Peyton 033)

  • 2:00 p.m.: Anatoly (Peyton 123)

  • 2:30 p.m.: Anatoly (Peyton 123)

  • 3:00 p.m.: Archie Bott

  • 3:30 p.m.: Eve Ostriker (Peyton 136)

  • 4:00 p.m.: Jill Knapp (Peyton 106)

  • 4:30 p.m.: Eliot Quataert (on travel) will meet at the Zoom link https://princeton.zoom.us/j/93051477713 - i can reschedule this zoom meeting easily for another day if anyone wants to meet with Ellen in person in this slot

  • 5:00 p.m.: Lucia Armillotta (Peyton 116)

  • 5:30 p.m.: Neta Bahcall (Peyton 137)

  • 6:00 p.m.: DINNER WITH HOST - meet in Grand Central

Dinner Sign-up (students have priority; 5 MAX) - add your name here:

1. Speaker Ellen Zweibel

2. Faculty host: Eve Ostriker

3. Postdoc host: Sarah Millholland

4. Lucia Armillotta

5. Shaunak Modak

NO MORE THAN 5 PEOPLE (due to COVID safety)