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.

Abstract

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.

Citation

Yang(杨光), G., Brandt, W., Darvish, B., Chen(陳建廷), C.-T., Vito, F., Alexander, D., Bauer, F., & Trump, J. (2018). Does black-hole growth depend on the cosmic environment?. Monthly Notices of the Royal Astronomical Society, 480(1), 1022-1042. https://doi.org/10.1093/mnras/sty1910

• 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
• DOI: https://doi.org/10.1093/mnras/sty1910
• Public URL: https://durham-repository.worktribe.com/output/1320855