TY - JOUR
T1 - Supermassive black holes are growing slowly by z∼5
AU - Lai, Samuel
AU - Onken, Christopher A.
AU - Wolf, Christian
AU - Bian, Fuyan
AU - Fan, Xiaohui
N1 - Publisher Copyright:
©λ)U(1 - ϵ )/ϵ = 1.79 ± 0.06, where
PY - 2024/6
Y1 - 2024/6
N2 - We investigate the black hole mass function at z ∼5 using XQz5, our recent sample of the most luminous quasars between the redshifts 4.5 < z < 5.3. We include 72 quasars with black hole masses estimated from velocity-broadened emission-line measurements and single-epoch virial prescriptions in the footprint of a highly complete parent survey. The sample mean Eddington ratio and standard deviation is log λ ≈ -0.20 ± 0.24. The completeness-corrected mass function is modelled as a double power law, and we constrain its evolution across redshift assuming accretion-dominated mass growth.
AB - We investigate the black hole mass function at z ∼5 using XQz5, our recent sample of the most luminous quasars between the redshifts 4.5 < z < 5.3. We include 72 quasars with black hole masses estimated from velocity-broadened emission-line measurements and single-epoch virial prescriptions in the footprint of a highly complete parent survey. The sample mean Eddington ratio and standard deviation is log λ ≈ -0.20 ± 0.24. The completeness-corrected mass function is modelled as a double power law, and we constrain its evolution across redshift assuming accretion-dominated mass growth.
KW - galaxies: active
KW - galaxies: high-redshift
KW - quasars: emission lines
KW - quasars: supermassive black holes
UR - http://www.scopus.com/inward/record.url?scp=85194963873&partnerID=8YFLogxK
U2 - 10.1093/mnras/stae1301
DO - 10.1093/mnras/stae1301
M3 - Article
AN - SCOPUS:85194963873
SN - 0035-8711
VL - 531
SP - 2245
EP - 2261
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 2
ER -