Colloquia Schedule Spring 2016

Colloquia are on Tuesdays (unless otherwise indicated) at 3:30 pm in RLM 15.216B

Jan. 19

"Spirals, Gaps, and Cavities: Signposts of Planets in Protoplanetary Disks?"


Robin (Ruobing) Dong


host: Adam Kraus

Jan. 26

"The Key Influence of AGB Stars on the Evolution and Global Properties of Galaxies"


Martha L. Boyer

NASA Goddard

host: Kristen McQuinn

Feb. 2

"CAMPARE and Cal-Bridge: Two Synergistic Programs Forming a Successful New Model for Promoting Participation of Women and Underrepresented Minority Students in Astronomy"


Alexander L. Rudolph

California State Polytechnic University, Pomona

host: William Cochran

Feb. 9

"Exoplanet Atmospheres in High Resolution"


Jayne L. Birkby

Harvard-Smithsonian Center for Astrophysics

host: Daniel Jaffe

Feb. 16

"The Dynamical Evolution of Young Stellar Complexes in the Milky Way"


Alison I. Sills

McMaster University, Hamilton, ON

host: Natalie Gosnell

Feb. 23

"The Evolution of Galaxy Structural Properties"


Rachel Somerville

Rutgers University, Downsbrough Chair in Astrophysics

host: Shardha Jogee

Mar. 1

"A PHAT New Measurement of the High-Mass Stellar IMF"


Daniel Weisz

UC Berkeley/University of Washington

host: Michael Boylan-Kolchin

Mar. 8

"The Role of Dwarf-Dwarf Galaxy Interactions in Galaxy Assembly"

Massive galaxy mergers are an important mode of galaxy evolution and are observed to inspire intense starbursts, the growth of AGN, and significant rearranging of the galaxies' gas and dust. However, despite the fact that the majority of mergers at all epochs occur among low mass galaxies, whether these effects occur in the shallow gravitational potential wells of dwarf galaxies remains mostly uncharted territory. Mergers at low redshift in particular offer a high resolution look at a process that set the stage for galaxy assembly at earlier epochs when such low metallicity mergers were more frequent. I will present initial results and future plans for TiNy Titans, the first systematic study of a sample of interacting dwarf galaxies and the mechanisms governing their star formation and subsequent processing of the ISM. We find multi-wavelength evidence based on star formation rates, gas and dust content that mergers proceed substantially differently at low masses. Our survey further uncovers galaxy groups with only low-mass members, a discovery that appears to contradict predictions of structure formation from hydrodynamic cosmological simulations.


Sabrina Stierwalt

NRAO/University of Virginia

host: Kristen McQuinn

Mar. 15

No colloquium scheduled. (Spring Break)

Mar. 22

"Title: TBA"

Khee-Gan Lee

UC Berkeley/LBNL

host: Caitlin Casey

Mar. 29

"Title: TBA"

Hai Fu

University of Iowa

host: Caitlin Casey

Apr. 5

"Title: TBA"

Matthew Benacquista

University of Texas Rio Grande Valley

host: J. Craig Wheeler

Apr. 12

"Title: TBA"

William F. Bottke (Planetary Tinsley Scholar)

Southwest Research Instutite, Boulder, Colorado

host: Mike Endl/Judit Ries

Apr. 19

"Title: TBA"

Tiantian Yuan (Exgal Tinsley Scholar)

Australia National University

host: Chao-Ling Hung

Apr. 26

"Title: TBA"

Michael Cushing

University of Toledo

host: Brendan Bowler

May 3

"Title: TBA"

Kaitlin M. Kratter (ISM Tinsley Scholar)

Steward Observatory, University of Arizona

host: Adam Kraus

Visitors to the Department of Astronomy can find detailed information and maps on our Visiting Austin Page.

Please report omissions/corrections to: G. Orris at

5 February 2016
Astronomy Program · The University of Texas at Austin
prospective student inquiries:
site comments: · web accessibility policy · web privacy policy