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Jan 20
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No talk scheduled.
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Jan 27 |
John Kormendy
University of Texas at Austin |
"Scaling Laws for Dark Matter Halos in Late-Type and Dwarf Spheroidal Galaxies"
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Feb 3 |
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No talk scheduled.
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Feb 10 |
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No talk scheduled.
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Feb 17 |
John Lacy, Steve and Keely Finkelstein, and Harriet Dinerstein (4 speakers)
University of Texas at Austin |
"Sharing Teaching Techniques and Tools"
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Feb 24 |
Martha Boyer
NASA Goddard (host: Kristen McQuinn) |
"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
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Mar 2 |
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No talk scheduled.
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Mar 9 |
Amanda Kepley
National Radio Astronomy Observatory (NRAO) |
"Opening New Frontiers in the Study of Star Formation"
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Mar 16 |
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Spring Break: No talk scheduled.
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Mar 23 |
Joel Green
Space Telescope Science Institute (STScI) (host: Yao-Lun Yang) |
"Extreme Accretion: The Evolution of the FU Orionis Disk"
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Mar 30 |
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No talk scheduled
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Apr 6 |
Eric Becklin
University of California, Los Angeles (hosts: John Lacy, Dan Jaffe) |
"Stratospheric Observatory for Infrared Astronomy (SOFIA): Overview, the First Science Results, and Future Opportunities"
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Apr 13 |
Brendan Bowler
University of Texas at Austin (Hubble Fellow) |
"The Architecture, Atmospheres, and Origin of Giant Planets with High-Contrast Imaging"
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Apr 20 |
Anshu Gupta
Australian National University (host: Chao-Ling Hung) |
"Radial Distribution of Gas-Phase Metallicities of Galaxies in two CLASH Clusters at z ~ 0.35"
abstract
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Apr 27 |
Postdoc Mentoring Commitee
University of Texas at Austin |
"Applying for Your Next Job"
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May 4 |
Linda Strubbe
University of British Columbia (host: Jeff Silverman) |
"Developing scientific reasoning: at UBC and in West Africa"
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