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Aug. 25
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Steven Finkelstein
University of Texas at Austin
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Organizational Meeting
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Sep. 1
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11:00 a.m. this week only
Kelly Lockhart
Institute for Astronomy, University of Hawaii - Manoa
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Testing Theories of in situ Star Formation in the Nucleus of M31
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Sep. 8
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No talk scheduled
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Sep. 15
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Steve Finkelstein
The University of Texas at Austin
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A Semi-empirical Model of Reionization
abstract
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Sep. 22
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No talk scheduled
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Sep. 29
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No talk scheduled
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Oct. 6
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Anson D’Aloisio
University of Washington
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Probing Cosmological Reionization with the High-redshift Lyman-alpha Forest
abstract
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Oct. 13 (Talk #1)
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Jackie Champagne
The University of Texas at Austin
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Title: TBA
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Oct. 13 (Talk #2)
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Rebecca Larson
The University of Texas at Austin
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A Blind Search for Ly-a Emission from Galaxies at z = 6-8 with Deep HST Grism Spectra
abstract
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Oct. 20
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Marcelo Alvarez
Canadian Institute for Theoretical Astrophyics, University of Toronto
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Fundamental Physics with the Next Generation of Large Scale Structure Surveys
abstract
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Oct. 27
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No talk scheduled
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Nov. 3 (Talk #1)
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Kristy McQuinn
The University of Texas at Austin
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JWST Science Case: Resolved Stellar Populations
abstract
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Nov. 3 (Talk #2)
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Patrick Drew
The University of Texas at Austin
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Title: TBA
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Nov. 10
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Irene Shivaei
University of California, Riverside
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A Multi-Wavelength Census of Star Formation and Dust in Galaxies at z ~ 2
abstract
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Nov. 17
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Andreia Carrillo
The University of Texas at Austin
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Characterizing dw1335-29, a dwarf galaxy of M83
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Nov. 24
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Thanksgiving Holiday
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Dec. 1
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Allison Strom
California Institute of Technology
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Star-formation history and chemical enrichment in the early Universe: clues from the rest-UV and rest-optical spectra of high-redshift galaxies
Galaxies at the peak of cosmic star formation (z~2-3) exhibit significantly higher star formation rates and gas fractions at fixed stellar mass than nearby galaxies. These z~2-3 galaxies are also distinct in terms of their nebular spectra, reflecting important differences not only in the physical conditions of their interstellar medium (e.g., electron density and gas-phase metallicity), but also in the details of their massive stellar populations, especially their ionizing radiation fields. Jointly observing galaxies' HII regions, at rest-UV and rest-optical wavelengths, and massive stars, in the rest-UV bandpass, is central to constructing a framework for understanding the differences between z~2-3 and z~0 star-forming galaxies and for self-consistently explaining the trends observed in the high-redshift population. I will present results from the Keck Baryonic Structure Survey (KBSS), which uniquely combines observations of the rest-optical spectra of ~400 individual galaxies (obtained with Keck/MOSFIRE) with deep rest-UV spectroscopy of many of the same galaxies (obtained with Keck/LRIS). These measurements represent one of the most comprehensive spectroscopic studies of z~2-3 galaxies to date and, when compared with predictions from photoionization models, offer compelling evidence that high-redshift galaxies exhibit chemical abundance patterns distinct from local galaxies, likely as the result of systematic differences in their star-formation histories.
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