Colloquia Schedule Spring 2017
Colloquia are on Tuesdays (unless otherwise indicated) at 3:30 pm in RLM 15.216B
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One Minute Colloquium Astronomy Department and McDonald Observatory Personnel The University of Texas at Austin Organizer: Brendan Bowler |
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The OSIRIS-REx Asteroid Sample Return Mission The University of Arizona Lunar and Planetary Laboratory host: Anita Cochran |
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Observing the Evolution of Solids in Protoplanetary Disks Harvard-Smithsonian Center for Astrophysics host: Adam Kraus |
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Theory Frontiers Meeting POB 2.402 |
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Faculty Candidate Talks moved to Theory Seminar and ExGal Seminar Slots |
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Faculty Candidate Talks moved to Theory Seminar and ExGal Seminar Slots |
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Faculty Candidate Talks moved to Theory Seminar and ExGal Seminar Slots |
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Faculty Candidate Talks moved to Theory Seminar and ExGal Seminar Slots |
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Spring Break |
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External Review |
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PostDoc Colloquium (3 talks) Effect of supersonic gas streams on the primordial star formation Shingo Hirano, The University of Texas at Austin IGRINS (the traveling spectrometer) and what it can tell us about YSOs Kim Sokal, The University of Texas at Austin A Faint Flux-Limited LAE Sample at z = 0.3 Isak Wold, The University of Texas at Austin host: Mike Boylan-Kolchin |
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Debris Disks: Tracers of Planet Formation The University of Arizona Steward Observatory Harriet Dinerstein/Adam Kraus |
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Small Planets Transiting Nearby Small Stars University of Colorado, Boulder host: Cynthia Froning |
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The Grand Planetary Ensemble MIT Kavli Institute host: Michael Endl |
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The Growth of the Most Massive Galaxies in the Highest Density Regions: Evidence for In-Situ Star Formation in SpARCS Brightest Cluster Galaxies The most massive galaxies in the local universe reside at the centres of galaxy clusters. Often called Brightest Cluster Galaxies (BCGs), they exhibit, as a class, highly uniform properties and are distinct from the general galaxy population. This suggests formation processes which are themselves distinct from those which dominate in massive galaxies outside of cluster cores. The mass growth of BCGs is likely linked to the overall physics of hierarchical structure formation on galaxy cluster scales, including the fundamental processes of gas cooling, star formation, energy feedback and galaxy mergers, at the centers of giant dark matter halos. In this talk I will present new results from the largest study of high-redshift BCGs conducted to date, drawn from the SpARCS optical/NIR cluster survey. Using archival infrared data we show the star formation rate within BCGs increases to z~2, and can add as much mass to the BCG population as the previous standard model of growth by dry mergers. At low redshifts, and in X-ray/SZ selected clusters, the rare examples of star forming BCGs appear to be fed by large-scale cooling flows. However, the first of the SpARCS systems we have studied in detail, SpARCS1049, has revealed a very different phenomenon - a train-wreck of a galaxy merger at the center of the cluster. This is the first example of such a process in high-redshift cluster cores and may represent a new phase of BCG evolution, previously unaccounted for. McGill University host: Caitlin Casey |
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Planet Formation: the Direct Approach Lowell Observatory host: Fritz Benedict |
Visitors to the Department of Astronomy can find detailed information and maps on our Visiting Austin Page.
Please report omissions/corrections to: visitor@astro.as.utexas.edu.
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