English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Understanding the growth of high redshift massive black holes (MBHs) is aproblem of great astrophysical interest. The most luminous quasars at $z>6$ arefrequently observed but they represent only the tip of the iceberg as themajority of the low luminosity AGN population remains undetected. In thepresent study, we perform a radiation hydrodynamics cosmological simulation tostudy the growth of "normal" black holes in the high redshift universe. In oursimulation we model the formation of Pop III and Pop II stars along with theirchemical, mechanical and radiative feedback. We consider both UV and X-rayemission from an accreting BH to simulate its radiative feedback. The selectedhalo has a mass of $\rm 3 \times 10^{10}~M_{\odot}$ at $z=7.5$ and we turn onradiative feedback from a MBH seed of $\rm 10^5~M_{\odot}$ along with in-situstar formation at $z=12$ when the halo mass reaches well above the atomiccooling limit. We find that the MBH accretes only about 2200 $\rm M_{\odot}$during 320 Myr and the average mass accretion onto the MBH is a few times $\rm10^{-6}~M_{\odot}/yr$. Our results suggest that the stunted growth of MBH is aconsequence of supernovae in tandem with MBH feedback which drive largeoutflows and evacuate the gas from MBH vicinity. This may explain why apopulation of low luminosity AGN has not been detected so-far at $z>6$; thelarge contrast between the star formation rate and the MBH accretion rate maymake then hard to detect even in upcoming deep surveys.

Early growth of typical high redshift black holes seeded by direct collapse