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Not all peaks are created equal: the early growth of supermassive black holes
- Source :
- Monthly Notices of the Royal Astronomical Society. 509:3043-3064
- Publication Year :
- 2021
- Publisher :
- Oxford University Press (OUP), 2021.
-
Abstract
- In this work, we use the constrained Gaussian realization technique to study the early growth of supermassive black holes (SMBHs) in cosmological hydrodynamic simulations, exploring its relationship with features of the initial density peaks on large scales, ~1 Mpc/h. Our constrained simulations of volume (20 Mpc/h)^3 successfully reconstruct the large-scale structure as well as the black hole growth for the hosts of the rare 10^9 Msun SMBHs found in the BlueTides simulation at z~7. We run a set of simulations with constrained initial conditions by imposing a 5 \sigma_0(R_G) peak on scale of R_G = 1 Mpc/h varying different peak features, such as the shape and compactness as well as the tidal field surrounding the peak. We find that initial density peaks with high compactness and low tidal field induce the most rapid BH growth at early epochs. This is because compact density peaks with a more spherical large scale matter distribution lead to the formation of high density gas clumps in the centers of halos, and thus boost early BH accretion. Moreover, such initially compact density peaks in low tidal field regions also lead to a more compact BH host galaxy morphology. This can explain the tight correlation between BH growth and host galaxy compactness seen in observations.<br />Comment: matches MNRAS accepted version
- Subjects :
- Physics
Supermassive black hole
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Accretion (meteorology)
Field (physics)
FOS: Physical sciences
Sigma
Astronomy and Astrophysics
Scale (descriptive set theory)
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Astrophysics - Astrophysics of Galaxies
Galaxy
Compact space
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
Halo
Astrophysics::Galaxy Astrophysics
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 509
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....572baaa665c5ad4765866ace671b75c8