QSO Hosts and Companions at Higher Redshifts

Hutchings, J. B.

doi:10.1007/978-1-4615-0695-9_13

QSO Hosts and Their Environments 2001

DOI: 10.1007/978-1-4615-0695-9_13

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QSO Hosts and Companions at Higher Redshifts

J. B. Hutchings¹

Abstract: This review presents the current state of work on QSO hosts and companions at redshifts above 1. This includes the properties of QSO host galaxies, such as size, scale length, and luminosity, and morphology, as they appear to change with redshift and radio activity. This leads to a view of how the properties of galaxies that host QSOs change with cosmic time. I also review studies of the galaxy companions to QSOs at higher redshifts, and studies of the emission line gas in and around higher redshift QSOs. Thes… Show more

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Cited by 2 publications

References 16 publications

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Imaging of [CLC][ITAL]z[/ITAL][/CLC] ∼ 2 QSO Host Galaxies with the [ITAL]Hubble Space Telescope[/ITAL]

Hutchings¹,

Frenette²,

Hanisch³

et al. 2002

The Astronomical Journal

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We report on deep imaging in 2 filters with the PC2 camera of HST, of five QSOs at redshift ∼2, with a range of optical and radio luminosity. The observations included a suite of PSF observations which were used to construct new PSF models, described elsewhere by Dumont et al (2001). The new PSF models were used to remove the QSO nucleus from the images. We find that the host galaxies have resolved flux of order 10% of the QSO nuclei, and are generally luminous and blue, indicating active star-formation. While most have clearly irregular morphologies, the bulk of the flux can be modelled approximately by an r 1/4 law. However, all host galaxies also have an additional -2approximately exponential luminosity profile beyond a radius about 0.8 arcsec, as also seen in ground-based data with larger telescopes. The QSOs all have a number of nearby faint blue companions which may be young galaxies at the QSO redshift. We discuss implications for evolution of the host galaxies, their spheroidal populations, and central black holes.

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Imaging of [CLC][ITAL]z[/ITAL][/CLC] ∼ 2 QSO Host Galaxies with the [ITAL]Hubble Space Telescope[/ITAL]

Hutchings¹,

Frenette²,

Hanisch³

et al. 2002

The Astronomical Journal

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Host Galaxy Evolution in Radio‐Loud Active Galactic Nuclei

O’Dowd

Urry

2005

ApJ

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QSO Hosts and Companions at Higher Redshifts

Cited by 2 publications

References 16 publications

Imaging of [CLC][ITAL]z[/ITAL][/CLC] ∼ 2 QSO Host Galaxies with the [ITAL]Hubble Space Telescope[/ITAL]

Imaging of [CLC][ITAL]z[/ITAL][/CLC] ∼ 2 QSO Host Galaxies with the [ITAL]Hubble Space Telescope[/ITAL]

Host Galaxy Evolution in Radio‐Loud Active Galactic Nuclei

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