Publication details for Prof David AlexanderYang(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. (2018). Does black-hole growth depend on the cosmic environment? Monthly Notices of the Royal Astronomical Society 480(1): 1022-1042.
- Publication type: Journal Article
- ISSN/ISBN: 0035-8711 (print), 1365-2966 (electronic)
- DOI: 10.1093/mnras/sty1910
- Further publication details on publisher web site
- Durham Research Online (DRO) - may include full text
Author(s) from Durham
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
= 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 (
) 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
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
is strongly related to host-galaxy M⋆, regardless of environment.