PI: Antonino Cucchiara, University of the Virgin Islands, firstname.lastname@example.org
Address: University of the Virgin Islands, College of Science and Mathematics, #2 Brewers Bay road, St. Thomas, USVI 00802 USA
CoI: Stephen Cenko, NASA Goddard Space Flight Center
CoI: Edo Berger, Harvard U.
CoI: Ryan Chornock, Ohio U.
CoI: Bethany Cobb, George Washington University
CoI: Wen-fai Fong, U. of Arizona
CoI: Andy Fruchter, STScI
CoI: Tanmoy Laskar, UC Berkeley
CoI: Andrew Levan, University of Warwick
CoI: Daniel Perley, Dark Cosmology Centre
CoI: Nial Tanvir, University of Leicester
Title: High-Redshift Gamma-Ray Bursts as Probes of Cosmic Dawn
Abstract: Understanding the nature of the first stars and galaxies, the so-called epoch of "cosmic dawn", remains one of the foremost goals of modern astronomy. Due to their remarkable (though short-lived) luminosities, long-duration gamma-ray bursts (GRBs) offer a unique probe of this critical epoch in the evolution of the universe. Thanks largely to Gemini key observations, our group has demonstrated that GRBs do indeed explode at these redshifts, and provided comparable constraints on the neutral H fraction at z ~ 6 as the entire ensemble population of quasars. Here we aim to identify further events at 5>z > 8, and (via absorption spectroscopy) to measure the neutral H fraction and gas phase metallicity of GRB host galaxies at redshifts relevant for reionization for the first time.
Program Type: Standard/Extragalactic
Run 1 (2017A): GEM-NQ/NIRI -- 4hrs band 1 (GS-2017A-Q-24)
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360