Black hole accretion in low-mass galaxies since z ∼ 1

Yong Shi, George H. Rieke, Jennifer Donley, Michael Cooper, Christopher Willmer, Evan Kirby

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have selected a sample of X-ray-emitting active galactic nuclei (AGNs) in low-mass host galaxies (∼5 × 109-2 × 10 10 M) out to z ∼ 1. By comparing to AGNs in more massive hosts, we have found that the AGN spatial number density and the fraction of galaxies hosting AGNs depends strongly on the host mass, with the AGN host mass function peaking at intermediate mass and with the AGN fraction increasing with host mass. AGNs in low-mass hosts show strong cosmic evolution in comoving number density, the fraction of such galaxies hosting active nuclei, and the comoving X-ray energy density. The integrated X-ray luminosity function is used to estimate the amount of the accreted black hole mass in these AGNs and places a strong lower limit of 12% to the fraction of local low-mass galaxies hosting black holes, although a more likely value is probably much higher (>50%) once the heavily obscured objects missed in current X-ray surveys are accounted for.

Original languageEnglish (US)
Pages (from-to)794-806
Number of pages13
JournalAstrophysical Journal
Volume688
Issue number2
DOIs
StatePublished - Dec 1 2008

Fingerprint

active galactic nuclei
accretion
galaxies
x rays
active galaxies
flux density
luminosity
nuclei
estimates
energy

Keywords

  • Galaxies: active
  • Galaxies: nuclei
  • X-rays: galaxies

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Shi, Y., Rieke, G. H., Donley, J., Cooper, M., Willmer, C., & Kirby, E. (2008). Black hole accretion in low-mass galaxies since z ∼ 1. Astrophysical Journal, 688(2), 794-806. https://doi.org/10.1086/592192

Black hole accretion in low-mass galaxies since z ∼ 1. / Shi, Yong; Rieke, George H.; Donley, Jennifer; Cooper, Michael; Willmer, Christopher; Kirby, Evan.

In: Astrophysical Journal, Vol. 688, No. 2, 01.12.2008, p. 794-806.

Research output: Contribution to journalArticle

Shi, Y, Rieke, GH, Donley, J, Cooper, M, Willmer, C & Kirby, E 2008, 'Black hole accretion in low-mass galaxies since z ∼ 1', Astrophysical Journal, vol. 688, no. 2, pp. 794-806. https://doi.org/10.1086/592192
Shi Y, Rieke GH, Donley J, Cooper M, Willmer C, Kirby E. Black hole accretion in low-mass galaxies since z ∼ 1. Astrophysical Journal. 2008 Dec 1;688(2):794-806. https://doi.org/10.1086/592192
Shi, Yong ; Rieke, George H. ; Donley, Jennifer ; Cooper, Michael ; Willmer, Christopher ; Kirby, Evan. / Black hole accretion in low-mass galaxies since z ∼ 1. In: Astrophysical Journal. 2008 ; Vol. 688, No. 2. pp. 794-806.
@article{b36768f0ea2540f18ff1e7cfb5d774dd,
title = "Black hole accretion in low-mass galaxies since z ∼ 1",
abstract = "We have selected a sample of X-ray-emitting active galactic nuclei (AGNs) in low-mass host galaxies (∼5 × 109-2 × 10 10 M⊙) out to z ∼ 1. By comparing to AGNs in more massive hosts, we have found that the AGN spatial number density and the fraction of galaxies hosting AGNs depends strongly on the host mass, with the AGN host mass function peaking at intermediate mass and with the AGN fraction increasing with host mass. AGNs in low-mass hosts show strong cosmic evolution in comoving number density, the fraction of such galaxies hosting active nuclei, and the comoving X-ray energy density. The integrated X-ray luminosity function is used to estimate the amount of the accreted black hole mass in these AGNs and places a strong lower limit of 12{\%} to the fraction of local low-mass galaxies hosting black holes, although a more likely value is probably much higher (>50{\%}) once the heavily obscured objects missed in current X-ray surveys are accounted for.",
keywords = "Galaxies: active, Galaxies: nuclei, X-rays: galaxies",
author = "Yong Shi and Rieke, {George H.} and Jennifer Donley and Michael Cooper and Christopher Willmer and Evan Kirby",
year = "2008",
month = "12",
day = "1",
doi = "10.1086/592192",
language = "English (US)",
volume = "688",
pages = "794--806",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

TY - JOUR

T1 - Black hole accretion in low-mass galaxies since z ∼ 1

AU - Shi, Yong

AU - Rieke, George H.

AU - Donley, Jennifer

AU - Cooper, Michael

AU - Willmer, Christopher

AU - Kirby, Evan

PY - 2008/12/1

Y1 - 2008/12/1

N2 - We have selected a sample of X-ray-emitting active galactic nuclei (AGNs) in low-mass host galaxies (∼5 × 109-2 × 10 10 M⊙) out to z ∼ 1. By comparing to AGNs in more massive hosts, we have found that the AGN spatial number density and the fraction of galaxies hosting AGNs depends strongly on the host mass, with the AGN host mass function peaking at intermediate mass and with the AGN fraction increasing with host mass. AGNs in low-mass hosts show strong cosmic evolution in comoving number density, the fraction of such galaxies hosting active nuclei, and the comoving X-ray energy density. The integrated X-ray luminosity function is used to estimate the amount of the accreted black hole mass in these AGNs and places a strong lower limit of 12% to the fraction of local low-mass galaxies hosting black holes, although a more likely value is probably much higher (>50%) once the heavily obscured objects missed in current X-ray surveys are accounted for.

AB - We have selected a sample of X-ray-emitting active galactic nuclei (AGNs) in low-mass host galaxies (∼5 × 109-2 × 10 10 M⊙) out to z ∼ 1. By comparing to AGNs in more massive hosts, we have found that the AGN spatial number density and the fraction of galaxies hosting AGNs depends strongly on the host mass, with the AGN host mass function peaking at intermediate mass and with the AGN fraction increasing with host mass. AGNs in low-mass hosts show strong cosmic evolution in comoving number density, the fraction of such galaxies hosting active nuclei, and the comoving X-ray energy density. The integrated X-ray luminosity function is used to estimate the amount of the accreted black hole mass in these AGNs and places a strong lower limit of 12% to the fraction of local low-mass galaxies hosting black holes, although a more likely value is probably much higher (>50%) once the heavily obscured objects missed in current X-ray surveys are accounted for.

KW - Galaxies: active

KW - Galaxies: nuclei

KW - X-rays: galaxies

UR - http://www.scopus.com/inward/record.url?scp=56849095664&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=56849095664&partnerID=8YFLogxK

U2 - 10.1086/592192

DO - 10.1086/592192

M3 - Article

AN - SCOPUS:56849095664

VL - 688

SP - 794

EP - 806

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

ER -