Astronomy 386S - Spring 2015
Seminar in Extragalactic Astronomy
Th 3:30 · RLM 15.216B · Not for credit Spring 2015
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Date
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Speaker
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Title
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Jan 15
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Peter Erwin
MPE, Garching, Germany
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SPECIAL PRESENTATION: "Composite Bulges: The Coexistence of Classical Bulges and Disky Pseudobulges in Disk Galaxies" (host: Eva Noyola)
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Jan 22
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Shardha Jogee
University of Texas at Austin
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Organizational meeting.
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Jan 29
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Yi-Kuan Chiang
University of Texas at Austin
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"Surveying Galaxy Proto-clusters in Emission: A Large-scale Structure at z=2.44 and the outlook for HETDEX"
Galaxy proto-clusters at z>~2 provide a direct probe of the rapid mass assembly and galaxy growth of present day massive clusters. In this talk, I will present the discovery of a large-scale structure at z=2.44 in the HETDEX Pilot Survey. On a scale of few tens of Mpc comoving, this structure shows a complex overdensity of LAEs, which coincides with broad-band selected galaxies in COSMOS-UltraVISTA and zCOSMOS, and intergalactic gas revealed in the Lya absorption maps of Lee et al. (2014). We construct mock LAE catalogs to predict the cosmic evolution of this structure. Such an overdensity should have already broken away from the Hubble flow, and part of the structure will collapse to form a galaxy cluster with 10^14.5+-0.4 M_sun by z=0. The structure contains a higher median stellar mass of broad-band selected galaxies, a boost of extended Lya nebulae, and a marginal excess of active galactic nuclei relative to the field, supporting a scenario of accelerated galaxy evolution in cluster progenitors. I will present the expected performance of proto-cluster identification in the coming HETDEX survey.
close
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Feb 5
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John Feldmeier
Youngstown State University
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"Observational Studies of Intracluster and Intragroup Light and how HETDEX will help"
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Feb 12
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Peter Behroozi
Space Telescope Science Institute
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Special Colloquium: "Insights into Galaxy Formation from z =15 to the Present Day"
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Feb 19
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Desika Narayanan
Haverford College
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Special Colloquium: "Three Problems in Trying to Form Galaxies (and how ISM Physics can Save Us"
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Feb 26
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Gail Zasowski
Johns Hopkins University
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Special Colloquium: "New Tools for Galactic Archaeology from the Milky Way"
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Mar 5
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No talk scheduled
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Mar 12
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Christina Thompson
Northrop Grumman
Joel Green
Space Telescope Science Institute
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"Webb Telescope Briefing"
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Mar 19
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No talk scheduled. Spring Break: March 16-20.
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Mar 26
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Speaker: TBA
Affiliation: TBD
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"Title: TBA"
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Apr 2
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Speaker: TBA
Affiliation: TBD
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"Part of High z Meeting"
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Apr 9
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Matthew Stevans
University of Texas at Austin
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"Title: TBA"
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Apr 16
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Rebecca Tippens
University of Texas at Austin
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"Title: TBA"
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Apr 23
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Briana Indahl
University of Texas at Austin
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"Title: TBA"
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Apr 30
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John Kormendy
University of Texas at Austin
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"Title: TBA"
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May 7
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Speaker: TBA
Affiliation: TBD
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"Title: TBA"
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