Colloquia Schedule Fall 2015

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

Sep. 1

No Colloquium scheduled.

Sep. 8

"Convection in Cool Stars, as Revealed through Stellar Brightness Variations"


Fabienne Bastien

Pennsylvania State University

host: Adam Kraus or Bill Cochran

Sep. 15

"Compact Objects in Globular Clusters"


Thomas Maccarone

Texas Tech

host: Karl Gebhardt

Sep. 22

"Convection in Low-Mass Stellar Evolution, or 'What about magnetic fields?' "


Gregory Feiden

University of Uppsala, Sweden

host: Andrew Mann

Sep. 29

"Tracing the Cosmic Shutdown of Star Formation in Massive Galaxies"


Katherine Whitaker

Hubble Fellow, UMass Amherst

host: Steve Finkelstein

Oct. 6

"The Assembly of Disk Galaxies"


Susan Kassin

Space Telescope Science Institute

host: Rachael Livermore

Oct. 13

"Are we Correctly Measuring Star Formation Rates?"


Kristen McQuinn

University of Texas at Austin

host: Adam Kraus

Oct. 20

No Colloquium Scheduled, to avoid conflict with:
Bashfest 2015: Frank N. Bash Symposium 2015, October 18-20, 2015

Speaker: Dr. Frank N. Bash and invited speakers

"New Horizons in Astronomy"

Oct. 27

Tinsley Scholar: Interstellar Group (visiting: Oct 25-31)

"The Impact of Stellar Feedback on Molecular Clouds"


Stella Offner

Affiliation: University of Massachusetts, Amherst

host: Neal Evans

Nov. 3

Tinsley Scholar: Theory Group (visiting: late Oct - early Nov)

"Disk Dynamos: Understanding the Origin of Galacic Magnetic Fields"


Ethan Vishniac

Johns Hopkins University

host: TBD

Nov. 10

"From TripleSpec to NEWS: Exoplanet Discovery Science with Bread and Butter Infrared Spectroscopy"


Philip S. Muirhead

Boston University

host: Adam Kraus

Nov. 17

"New Insights on Galaxy Formation from Comparisons of Simulated and Observed Galaxies"


Joel R. Primack

UC Santa Cruz

host: Paul Shapiro

Nov. 24

No colloquium scheduled.

Dec. 1

DeVaucouleurs Medalist

"Expansion of the Universe Seen by Hubble"


Adam Riess

Johns-Hopkins University, and Space Telescope Science Institute, and DeVaucouleurs Medalist

host: Shardha Jogee, Chair

Dec. 8

"Supernovae and their Progenitor Systems (or lack thereof)"

Despite the robust empirical supernova (SN) classification scheme in place, the underlying progenitor systems remain ambiguous for many subclasses. The most straightforward constraint relies on a detection of the progenitor star in high-resolution pre-explosion images. Such a direct identification is typically not feasible, however, even with modern telescopes such as Hubble. Instead, astronomers are forced to rely on supernova "forensics," where the surrounding circumstellar medium can yield direct clues about the mass loss from the star in the years leading up to the SN explosion. I will begin the talk with a review of the limited number of direct progenitor detections already made, followed by a discussion of the indirect methods for constraining supernova progenitors that have never been seen. Although progenitor discussions have historically considered mostly single star systems, I will focus a significant portion of the discussion on the impact binary stars may have on our understanding of these results.


Ori Fox

Space Telescope Science Institute

host: Jeff Silverman

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

23 November 2015
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