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?"

abstract

Robin (Ruobing) Dong

LBNL/Berkeley

host: Adam Kraus

Jan. 26

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

Asymptotic Giant Branch stars play a variety of important roles in the Universe, from light-element enrichment of globular clusters to potential domination of a galaxy's dust production and total infrared luminosity. Consequently, they can significantly affect the evolution of their host galaxy and bias galaxy parameters derived from rest-frame near- to to mid-infrared observations. Despite their important role, AGB stars remain poorly modeled in part because of insufficient calibrating observations. I will discuss recent surveys of nearby galaxies that have significantly increased the sample of AGB stars across a wide span of ages and metallicities. In particular, I will focus on the survey of DUST in Nearby Galaxies with Spitzer (DUSTiNGS) and the Panchromatic Hubble Andromeda Treasure (PHAT) program. The DUSTiNGS survey investigated the effect of metallicity on AGB dust production by imaging 50 resolvable dwarf galaxies at mid-IR wavelengths. The survey identified hundreds of 'extreme' dusty AGB stars - the first detected in very metal-poor environments and the first detected beyond the Magellanic Clouds. The PHAT program imaged a third of M31's disk from optical to near-IR wavelengths, resulting in a vast catalog of AGB stars at solar metallicity and known distance. I will summarize the results from both programs and review some future prospects for AGB work in nearby galaxies.

close

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"

abstract

Alexander L. Rudolph

California State Polytechnic University, Pomona

host: William Cochran

Feb. 9

"Exoplanet Atmospheres in High Resolution"

abstract

Jayne L. Birkby

Harvard-Smithsonian Center for Astrophysics

host: Daniel Jaffe

Feb. 16

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

abstract

Alison I. Sills

McMaster University, Hamilton, ON

host: Natalie Gosnell

Feb. 23

"The Evolution of Galaxy Structural Properties"

abstract

Rachel Somerville

Rutgers University, Downsbrough Chair in Astrophysics

host: Shardha Jogee

Mar. 1

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

abstract

Daniel Weisz

UC Berkeley/University of Washington

host: Michael Boylan-Kolchin

Mar. 8

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

abstract

Sabrina Stierwalt

NRAO/University of Virginia

host: Kristen McQuinn

Mar. 15

No colloquium scheduled. (Spring Break)

Mar. 22

"Exploring the z~2.3 Cosmic Web with 3D Lyman-Alpha Forest Tomography"

abstract

Khee-Gan Lee

UC Berkeley/LBNL

host: Caitlin Casey

Mar. 29

"Understanding Galaxy Evolution with Massive Starburst Galaxies"

abstract

Hai Fu

University of Iowa

host: Caitlin Casey

Apr. 5

"Implications from the Detection of the Binary Black Hole Inspiral GW150914"

abstract

Matthew Benacquista

University of Texas Rio Grande Valley

host: J. Craig Wheeler

Apr. 6

Stellar Seminar talk Date/Time: Wed., 12 Noon: "Title: TBA"

David Yong (Stellar Tinsley Scholar)

Mt. Stromlo Observatory, Australia

host: Fritz Benedict

Apr. 12

"The Calm Before the Storm: Exploring the Post Accretionary Doldrums Prior to the Late Heavy Bombardment"

abstract

William F. Bottke (Planetary Tinsley Scholar)

Southwest Research Instutite, Boulder, Colorado

host: Mike Endl/Judit Ries

Apr. 19

"Disk Galaxy Assembly Across Cosmic Time: Combining Magnitude-limited Survey with Gravitational Lensing"

abstract

Tiantian Yuan (Exgal Tinsley Scholar)

Australia National University

host: Chao-Ling Hung

Apr. 26

"The Discovery and Characterization of the Y Dwarfs"

abstract

Michael Cushing

University of Toledo

host: Brendan Bowler

May 3

"What can Binaries tell us about Planet Formation?"

abstract

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 argus@astro.as.utexas.edu.

15 April 2016
Astronomy Program · The University of Texas at Austin
prospective student inquiries: studentinfo@astro.as.utexas.edu
site comments: www@astro.as.utexas.edu · web accessibility policy · web privacy policy