HST WFC3/IR OBSERVATIONS of ACTIVE GALACTIC NUCLEUS HOST GALAXIES at z ∼ 2

SUPERMASSIVE BLACK HOLES GROW in DISK GALAXIES

Kevin Schawinski, Ezequiel Treister, C. Megan Urry, Carolin N. Cardamone, Brooke Simmons, Sukyoung Yi

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

We present the rest-frame optical morphologies of active galactic nucleus (AGN) host galaxies at 1.5 < z < 3, using near-infrared imaging from the Hubble Space Telescope Wide Field Camera 3, the first such study of AGN host galaxies at these redshifts. The AGNs are X-ray-selected from the Chandra Deep Field South and have typical luminosities of 1042 erg s-1<L X < 1044 erg s-1. Accreting black holes in this luminosity and redshift range account for a substantial fraction of the total space density and black hole mass growth over cosmic time; they thus represent an important mode of black hole growth in the universe. We find that the majority (∼80%) of the host galaxies of these AGNs have low Sérsic indices indicative of disk-dominated light profiles, suggesting that secular processes govern a significant fraction of the cosmic growth of black holes. That is, many black holes in the present-day universe grew much of their mass in disk-dominated galaxies and not in early-type galaxies or major mergers. The properties of the AGN host galaxies are furthermore indistinguishable from their parent galaxy population and we find no strong evolution in either effective radii or morphological mix between z ∼ 2 and z ∼ 0.05.

Original languageEnglish
Article numberL31
JournalAstrophysical Journal Letters
Volume727
Issue number2
DOIs
Publication statusPublished - 2011 Feb 1

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active galactic nuclei
galaxies
erg
merger
near infrared
universe
luminosity
space density
disk galaxies
Hubble Space Telescope
cameras
radii
profiles
x rays
index

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Schawinski, Kevin ; Treister, Ezequiel ; Urry, C. Megan ; Cardamone, Carolin N. ; Simmons, Brooke ; Yi, Sukyoung. / HST WFC3/IR OBSERVATIONS of ACTIVE GALACTIC NUCLEUS HOST GALAXIES at z ∼ 2 : SUPERMASSIVE BLACK HOLES GROW in DISK GALAXIES. In: Astrophysical Journal Letters. 2011 ; Vol. 727, No. 2.
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abstract = "We present the rest-frame optical morphologies of active galactic nucleus (AGN) host galaxies at 1.5 < z < 3, using near-infrared imaging from the Hubble Space Telescope Wide Field Camera 3, the first such study of AGN host galaxies at these redshifts. The AGNs are X-ray-selected from the Chandra Deep Field South and have typical luminosities of 1042 erg s-1<L X < 1044 erg s-1. Accreting black holes in this luminosity and redshift range account for a substantial fraction of the total space density and black hole mass growth over cosmic time; they thus represent an important mode of black hole growth in the universe. We find that the majority (∼80{\%}) of the host galaxies of these AGNs have low S{\'e}rsic indices indicative of disk-dominated light profiles, suggesting that secular processes govern a significant fraction of the cosmic growth of black holes. That is, many black holes in the present-day universe grew much of their mass in disk-dominated galaxies and not in early-type galaxies or major mergers. The properties of the AGN host galaxies are furthermore indistinguishable from their parent galaxy population and we find no strong evolution in either effective radii or morphological mix between z ∼ 2 and z ∼ 0.05.",
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HST WFC3/IR OBSERVATIONS of ACTIVE GALACTIC NUCLEUS HOST GALAXIES at z ∼ 2 : SUPERMASSIVE BLACK HOLES GROW in DISK GALAXIES. / Schawinski, Kevin; Treister, Ezequiel; Urry, C. Megan; Cardamone, Carolin N.; Simmons, Brooke; Yi, Sukyoung.

In: Astrophysical Journal Letters, Vol. 727, No. 2, L31, 01.02.2011.

Research output: Contribution to journalArticle

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