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Title: Lyman-α Emission from an Infant Black Hole in the Early Universe

The COSMOS survey recently discovered an exotic young galaxy, COSMOS Redshift 7 (CR7), in the early universe (1 billion years after the Big Bang), which is devoid of evidence of elements heavier than hydrogen and helium. Whereas some believe this might be the first galaxy discovered with stars made only from these elements, others think CR7 may be powered by a newborn supermassive black hole. In this paper, we summarize for a general academic audience our efforts to model the creation of this galaxy through cosmological simulations. These state-of-the-art calculations include primordial chemistry and cooling and the interaction of x-rays from the black hole with surrounding gas. We simulate the process of light escaping this object with Monte Carlo Lyman-α transfer and compare our calculations with observations of CR7. Our work demonstrates the viability of the black hole interpretation for this intriguing object in the early universe.
Authors:
 [1] ; ORCiD logo [2] ; ORCiD logo [2]
  1. Southern Utah Univ., Cedar City, UT (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-16-23949
Journal ID: ISSN 0083-4823
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Journal of the Utah Academy of Sciences, Arts, & Letters
Additional Journal Information:
Journal Volume: 93; Related Information: ISBN-13: 978-0-9988268-0-6; Journal ID: ISSN 0083-4823
Publisher:
University of Utah
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS
OSTI Identifier:
1361480