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Detecting direct collapse black holes: making the case for CR7
Yale Univ, Dept Astron, 52 Hillhouse Ave,Steinbach Hall, New Haven, CT 06511 USA..
Los Alamos Natl Lab, Theoret Div X, Los Alamos, NM 87545 USA..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Observational Astronomy.
Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands..
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2016 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 460, no 4, 4003-4010 p.Article in journal (Refereed) Published
Abstract [en]

We propose that one of the sources in the recently detected system CR7 by Sobral et al. through spectrophotometric measurements at z=6.6 harbours a direct collapse black hole (DCBH). We argue that the LW radiation field required for direct collapse in source A is provided by sources B and C.By tracing the LW production history and star formation rate over cosmic time for the halo hosting CR7 in a ACDM universe, we demonstrate that a DCBH could have formed at z similar to 20. The spectrum of source A is well fit by nebular emission from primordial gas around a BH with MBH similar to 4.4x10(6)M(circle dot) accreting at a 40 per cent of the Eddington rate, which strongly supports our interpretation of the data. Combining these lines of evidence, we argue that CR7 might well be the first DCBH candidate.

Place, publisher, year, edition, pages
2016. Vol. 460, no 4, 4003-4010 p.
Keyword [en]
galaxies: high-redshift, quasars: supermassive black holes, dark ages, reionization, first stars
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-307888DOI: 10.1093/mnras/stw1173ISI: 000381711100046OAI: oai:DiVA.org:uu-307888DiVA: diva2:1048803
Funder
Swedish Research Council, 2011-5349
Available from: 2016-11-22 Created: 2016-11-22 Last updated: 2016-11-22Bibliographically approved

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Zackrisson, Erik
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