Date

Speaker

Title

Aug 28

Shardha Jogee

University of Texas at Austin

Organizational meeting.

Sep 4

No talk scheduled.

Sep 11

Sarah Tuttle

University of Texas at Austin

"Star Formation in Surprising Places: Investigating Blue Bulge/Red Disk Galaxies"

Sep 18

No talk scheduled.

Sep 25

Dr. Niall I. Gaffney & Dr. Weijia Xu

University of Texas at Austin: Texas Advanced Computing Center (TACC)

"Supporting Data Research at TACC"

Oct 2

Chao-Ling Hung

University of Hawaii, and Harvard/SAO

(host: Steve Finkelstein) "Origin and Evolution of High-Redshift Infrared-Luminous Galaxies"

abstract

Oct 9

Jeff Silverman

University of Texas at Austin

"High-Velocity Features in the Spectra of Type-Ia Supernovae"

Oct 16

No talk scheduled.

Oct 23

Brett W. Salmon

Texas A&M University

"Star-Forming Galaxies in the z>4 Universe"

Oct 24
Fri
2 PM

Mimi Song

University of Texas at Austin

(note: special rescheduled day and time) "Early Galaxies at Cosmic Dawn and Cosmic Noon"

Oct 30

Elena D'Onghia

University of Wisconsin-Madison

(host: Shardha Jogee) "Phase Wrapping in the Galactic Disk and Formation of the Thick Disk"

abstract

Nov 6

Daniel Perley

California Institute of Technology (Caltech)

(host: Jeff Silverman) "13 Billion Years of Cosmic History as Seen by Gamma-Ray Bursts"

abstract

Nov 13

No talk scheduled.

Nov 20

Brandon Bozek

University of Maryland

(host: Shardha Jogee) "Constraints on Axion Dark Matter"

Low-mass star-forming galaxies that formed early in the universe are expected to be a primary driver of reionization and their numbers at high redshift are therefore of great interest. Within the standard CDM paradigm, there are several outstanding small-scale conflicts between the dark matter halos expected to host low-mass galaxies and observations of dwarf galaxies in the Local Group. If the dark matter were instead composed of axions, then structure formation in the Universe would be suppressed below the axion Jeans scale possibly resolving the small-scale tensions found in CDM. However, this would impact the population of high-redshift dwarf galaxies. I will present constraints on the range of axion mass and axion fraction of dark matter using the high-z Hubble ultra-deep field UV-luminosity function and optical depth to reionization measured from CMB polarization. I will also discuss the ability of future experiments to probe axion parameter space further.

close

Nov 27

Thanksgiving Day Holiday: Staff Holiday. No classes scheduled.

Dec 4
NHB 1.720
4 PM

C. Megan Urry

Yale University, and DeVaucouleurs Medalist

UT College of Natural Sciences 'Women in Science' Lecture: "Why so Few? The Dearth of Women in Science"