Detecting direct collapse black holes: making the case for CR7

作者：Agarwal Bhaskar^*; Johnson Jarrett L; Zackrisson Erik; Labbe Ivo; van den Bosch Frank C; Natarajan Priyamvada; Khochfar Sadegh

来源：Monthly Notices of the Royal Astronomical Society, 2016, 460(4): 4003-4010.

DOI：10.1093/mnras/stw1173

• galaxies: high-redshift
• quasars: supermassive black holes
• dark ages
• reionization
• first stars

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.

• 出版日期2016-8-21
• 单位Los Alamos