|
Aug. 25
|
Steven Finkelstein
University of Texas at Austin
|
Organizational Meeting
|
|
|
Sep. 1
|
11:00 a.m. this week only
Kelly Lockhart
Institute for Astronomy, University of Hawaii - Manoa
|
Testing Theories of in situ Star Formation in the Nucleus of M31
|
|
|
Sep. 8
|
No talk scheduled
|
|
|
|
Sep. 15
|
Steve Finkelstein
The University of Texas at Austin
|
A Semi-empirical Model of Reionization
abstract
|
|
|
Sep. 22
|
No talk scheduled
|
|
|
|
Sep. 29
|
No talk scheduled
|
|
|
Oct. 6
|
Anson D’Aloisio
University of Washington
|
Probing Cosmological Reionization with the High-redshift Lyman-alpha Forest
abstract
|
|
|
Oct. 13 (Talk #1)
|
Jackie Champagne
The University of Texas at Austin
|
Title: TBA
|
|
|
Oct. 13 (Talk #2)
|
Rebecca Larson
The University of Texas at Austin
|
A Blind Search for Ly-a Emission from Galaxies at z = 6-8 with Deep HST Grism Spectra
This project aims to detect Ly-a emission lines from z = 6-8 galaxies to probe the ionization state of the intergalactic medium (IGM) during the epoch of reionization. We use extremely deep data from the Faint Infrared Grism Survey (FIGS; PI: Malhotra) which is currently the most sensitive G102 grism survey, targeting the high-redshift galaxies that were discovered in the CANDELS GOODS fields (Finkelstein et al. 2015). This dataset has already proven to be successful as one of these candidates, at redshift z=7.51, has been observed to have Ly-a emission detectable with the HST grism (Tilvi et al 2016). The FIGS data uses five separate roll-angles of HST in an effort to reduce the overall contamination effects of nearby galaxies. We have created a method that accounts for and removes the contamination from surrounding galaxies, and also removes any residual continuum emission from each individual spectrum. We then utilize a MCMC routine to blindly search for 5-sigma emission lines in each individual spectrum. We compare the results for each galaxy across all roll angles and identify significant lines as those which are detected at the same wavelength in more than one roll angle. We have found several z > 7 candidates which, if confirmed, will increase the number of confirmed galaxies at this epoch by ~50%. The coarse spectral resolution of the G102 grism prevents us from measuring the expected asymmetric profile of the Ly-a emission line, so we have proposed for follow-up observations of our objects with ground based facilities.
close
|
|
|
Oct. 20
|
Marcelo Alvarez
Canadian Institute for Theoretical Astrophyics, University of Toronto
|
Fundamental Physics with the Next Generation of Large Scale Structure Surveys
abstract
|
|
|
Oct. 27
|
No talk scheduled
|
|
|
|
Nov. 3 (Talk #1)
|
Kristy McQuinn
The University of Texas at Austin
|
JWST Science Case: Resolved Stellar Populations
abstract
|
|
|
Nov. 3 (Talk #2)
|
Patrick Drew
The University of Texas at Austin
|
Title: TBA
|
|
|
Nov. 10
|
Irene Shivaei
University of California, Riverside
|
A Multi-Wavelength Census of Star Formation and Dust in Galaxies at z ~ 2
abstract
|
|
|
Nov. 17
|
Andreia Carrillo
The University of Texas at Austin
|
Characterizing dw1335-29, a dwarf galaxy of M83
|
|
|
Nov. 24
|
Thanksgiving Holiday
|
|
|
Dec. 1
|
Allison Strom
California Institute of Technology
|
Star-formation history and chemical enrichment in the early Universe: clues from the rest-UV and rest-optical spectra of high-redshift galaxies
abstract
|
|
