Calendar

Oct
20
Fri
ASTR 535 – Observational Techniques I
Oct 20 @ 9:30 am – 10:20 am
Planetary Group meeting
Oct 20 @ 10:30 am – 11:30 am
Colloquium: Benjamin Oppenheimer (Host: Kristian Finlator)
Oct 20 @ 3:15 pm – 4:15 pm
Colloquium: Benjamin Oppenheimer (Host: Kristian Finlator) @ BX102

Breaking the Self-Similarity of Galaxy Formation: A Circumgalactic Medium Perspective

Benjamin Oppenheimer, University of Colorado Boulder

If you could see a dark matter halo directly without knowing the scale, you probably could not distinguish a Milky Way halo from a cluster-sized halo.  However, if you look at the galaxies, you would likely see a dominant spiral galaxy in the former and a many quenched and quenching galaxies in the latter.  The study of galaxy formation aims to understand how very different galaxies form in dark matter halos of different masses.  I will argue for the importance of understanding the gaseous baryons in this context.  In contrast to the hot intracluster medium detected in emission in clusters, the circumgalactic medium (CGM) has to be probed by absorption lines toward background quasars and tells a vastly different and complicated story.  I will demonstrate, with the aid of hydrodynamic simulations, how the CGM is multi-phase (with cool ~10^4 K clouds embedded in a hot, ambient medium), plus how non-equilibrium ionization processes altering the heavy element ions we probe in spectra.  The next frontiers in the CGM require understanding the dynamics encoded not only in absorption line spectra of the UV, but in the X-ray via emission and absorption.

 

 

Oct
23
Mon
ASTR 535 – Observational Techniques I
Oct 23 @ 9:30 am – 10:20 am
ASTR 670 – Heliophysics
Oct 23 @ 11:00 am – 12:15 pm
Pizza Lunch: Kristian Finlator
Oct 23 @ 12:30 pm – 1:30 pm
Pizza Lunch: Kristian Finlator @ AY 119

Vastly Improved Simulations of the Hydrogen Reionization Epoch: Too Much for One Paper?

Oct
24
Tue
ASTR 565 – Stellar Interiors
Oct 24 @ 11:45 am – 1:00 pm
Astro-ph Discussion
Oct 24 @ 2:30 pm – 3:00 pm
Astro-ph Discussion @ AY119
Oct
25
Wed
ASTR 535 – Observational Techniques I
Oct 25 @ 9:30 am – 10:20 am
ASTR 670 – Heliophysics
Oct 25 @ 11:00 am – 12:15 pm