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Does black-hole growth depend on the cosmic environment?

Yang(杨光), G.; Brandt, W.N.; Darvish, B.; Chen(陳建廷), C.-T.J.; Vito, F.; Alexander, D.M.; Bauer, F.E.; Trump, J.R.

Does black-hole growth depend on the cosmic environment? Thumbnail


G. Yang(杨光)

W.N. Brandt

B. Darvish

C.-T.J. Chen(陳建廷)

F. Vito

F.E. Bauer

J.R. Trump


It is well known that environment affects galaxy evolution, which is broadly related to supermassive black hole (SMBH) growth. We investigate whether SMBH evolution also depends on host-galaxy local (sub-Mpc) and global (≈1–10 Mpc) environment. We construct the surface-density field (local environment) and cosmic web (global environment) in the Cosmic Evolution Survey (COSMOS) field at z = 0.3–3.0. The environments in COSMOS range from the field to clusters (Mhalo ≲ 1014 M⊙), covering the environments where ≈99 per cent of galaxies in the Universe reside. We measure sample-averaged SMBH accretion rate ( BHAR¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ ) from X-ray observations, and study its dependence on overdensity and cosmic-web environment at different redshifts while controlling for galaxy stellar mass (M⋆). Our results show that BHAR¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ does not significantly depend on overdensity or cosmic-web environment once M⋆ is controlled, indicating that environment-related physical mechanisms (e.g. tidal interaction and ram-pressure stripping) might not significantly affect SMBH growth. We find that BHAR¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ is strongly related to host-galaxy M⋆, regardless of environment.


Yang(杨光), G., Brandt, W., Darvish, B., Chen(陳建廷), C., Vito, F., Alexander, D., …Trump, J. (2018). Does black-hole growth depend on the cosmic environment?. Monthly Notices of the Royal Astronomical Society, 480(1), 1022-1042.

Journal Article Type Article
Acceptance Date Jul 14, 2018
Online Publication Date Jul 19, 2018
Publication Date Oct 11, 2018
Deposit Date Sep 5, 2018
Publicly Available Date Sep 13, 2018
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 480
Issue 1
Pages 1022-1042
Public URL


Published Journal Article (3.3 Mb)

Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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