New constraints on direct collapse black hole formation in the early Universe

Abstract

Direct collapse black holes (DCBH) have been proposed as a solution to the challenge of assembling supermassive black holes by $z>6$ to explain the bright quasars observed at this epoch. The formation of a DCBH seed with ${\mathrm{M}}_{\mathrm{BH}}\sim 10^{4-5}{\mathrm{M}}_{\odot }$ requires a pristine atomic-cooling halo to be illuminated by an external radiation field that is sufficiently strong to entirely suppress H${}_2$ cooling in the halo. Many previous studies have attempted to constrain the critical specific intensity that is likely required to suppress H${}_2$ cooling, denoted as $J_{\mathrm{crit}}$. However, these studies have typically assumed that the incident external radiation field can be modeled with a black-body spectrum. Under this assumption, it is possible to derive a {unique} value for $J_{\mathrm{crit}}$ that depends only on the temperature of the black-body. In this study we consider a more realistic spectral energy distribution (SED) for the external source of radiation that depends entirely on its star formation history and age. The rate of destruction of the species responsible for suppressing molecular hydrogen cooling depends on the detailed shape of the SED. Therefore the value of $J_{\mathrm{crit}}$ is tied to the shape of the incident SED of the neighbouring galaxy. We fit a parametric form to the rates of destruction of H${}_2$ and H${}^{-}$ that permit direct collapse. Owing to this, we find that $J_{\mathrm{crit}}$ is not a fixed threshold but can lie anywhere in the range $J_{\mathrm{crit}}\sim 0.5$--$10^3$, depending on the details of the source stellar population.

10 pages, 6 figures. Accepted for publication in MNRAS

References in corpus (17)

• A luminous quasar at a redshift of z = 7.085
• Formation of Supermassive Black Holes by Direct Collapse in Pregalactic Halos
• An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
• Supermassive black hole formation during the assembly of pre-galactic discs
• Accretion onto the First Stellar Mass Black Holes
• Fluctuations in the High-Redshift Lyman-Werner Background: Close Halo Pairs as the Origin of Supermassive Black Holes
• Rapid growth of seed black holes in the early universe by supra-exponential accretion
• Two populations of metal-free stars in the early Universe
• The identification of z-dropouts in Pan-STARRS1: three quasars at 6.5<z<6.7
• Feedback-regulated Super Massive Black Hole Seed Formation
• The critical radiation intensity for direct collapse black hole formation: dependence on the radiation spectral shape
• The First Population II Stars Formed in Externally Enriched Mini-halos
• How realistic UV spectra and X-rays suppress the abundance of direct collapse black holes
• A UV flux constraint on the formation of direct collapse black holes
• Revised rate coefficients for H${}_2$ and H${}^{-}$ destruction by realistic stellar spectra
• Lower Metal Enrichment of Virialized Gas in Minihalos
• Simulating the formation of massive seed black holes in the early Universe. II: Impact of rate coefficient uncertainties

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