Detecting direct collapse black holes: making the case for CR7
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
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.
galaxies: high-redshift, quasars: supermassive black holes, dark ages, reionization, first stars
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:uu:diva-307888DOI: 10.1093/mnras/stw1173ISI: 000381711100046OAI: oai:DiVA.org:uu-307888DiVA: diva2:1048803
FunderSwedish Research Council, 2011-5349