Publication

Redshifts of class radio sources

Marlow, DR., Rusin, D., Jackson, N., Wilkinson, PN., Browne, IWA. & Koopmans, L., Jun-2000, In : The Astronomical Journal. 119, 6, p. 2629-2633 5 p.

Research output: Contribution to journalArticleAcademicpeer-review

APA

Marlow, DR., Rusin, D., Jackson, N., Wilkinson, PN., Browne, IWA., & Koopmans, L. (2000). Redshifts of class radio sources. The Astronomical Journal, 119(6), 2629-2633.

Author

Marlow, DR ; Rusin, D ; Jackson, N ; Wilkinson, PN ; Browne, IWA ; Koopmans, L. / Redshifts of class radio sources. In: The Astronomical Journal. 2000 ; Vol. 119, No. 6. pp. 2629-2633.

Harvard

Marlow, DR, Rusin, D, Jackson, N, Wilkinson, PN, Browne, IWA & Koopmans, L 2000, 'Redshifts of class radio sources', The Astronomical Journal, vol. 119, no. 6, pp. 2629-2633.

Standard

Redshifts of class radio sources. / Marlow, DR; Rusin, D; Jackson, N; Wilkinson, PN; Browne, IWA; Koopmans, L.

In: The Astronomical Journal, Vol. 119, No. 6, 06.2000, p. 2629-2633.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

Marlow DR, Rusin D, Jackson N, Wilkinson PN, Browne IWA, Koopmans L. Redshifts of class radio sources. The Astronomical Journal. 2000 Jun;119(6):2629-2633.


BibTeX

@article{bb9334361d7b429c94e4853d473ea073,
title = "Redshifts of class radio sources",
abstract = "Spectroscopic observations of a sample of 42 flat-spectrum radio sources from the Cosmic Lens All-Sky Survey (CLASS) have yielded a mean redshift of (z) = 1.27 with an rms spread of 0.95, at a completeness level of 64{\%}. The sample consists of sources with a 5 GHz flux density of 25-50 mJy, making it the faintest flat-spectrum radio sample for which the redshift distribution has been studied. The spectra, obtained with the William Herschel Telescope, consist mainly of broad-line quasars at z > 1 and narrow-line galaxies at z <0.5. Though the mean redshift of flat-spectrum radio sources exhibits little variation over more than 2 orders of magnitude in radio flux density, there is evidence of a decreasing fraction of quasars at weaker flux levels. We present the results of our spectroscopic observations and discuss the implications for constraining cosmological parameters with statistical analyses of CLASS.",
keywords = "gravitational lensing, PHASE CALIBRATION SOURCES, VLA ASTROMETRIC SURVEY, CATALOG",
author = "DR Marlow and D Rusin and N Jackson and PN Wilkinson and IWA Browne and L Koopmans",
year = "2000",
month = "6",
language = "English",
volume = "119",
pages = "2629--2633",
journal = "The Astronomical Journal",
issn = "0004-6256",
publisher = "IOP PUBLISHING LTD",
number = "6",

}

RIS

TY - JOUR

T1 - Redshifts of class radio sources

AU - Marlow, DR

AU - Rusin, D

AU - Jackson, N

AU - Wilkinson, PN

AU - Browne, IWA

AU - Koopmans, L

PY - 2000/6

Y1 - 2000/6

N2 - Spectroscopic observations of a sample of 42 flat-spectrum radio sources from the Cosmic Lens All-Sky Survey (CLASS) have yielded a mean redshift of (z) = 1.27 with an rms spread of 0.95, at a completeness level of 64%. The sample consists of sources with a 5 GHz flux density of 25-50 mJy, making it the faintest flat-spectrum radio sample for which the redshift distribution has been studied. The spectra, obtained with the William Herschel Telescope, consist mainly of broad-line quasars at z > 1 and narrow-line galaxies at z <0.5. Though the mean redshift of flat-spectrum radio sources exhibits little variation over more than 2 orders of magnitude in radio flux density, there is evidence of a decreasing fraction of quasars at weaker flux levels. We present the results of our spectroscopic observations and discuss the implications for constraining cosmological parameters with statistical analyses of CLASS.

AB - Spectroscopic observations of a sample of 42 flat-spectrum radio sources from the Cosmic Lens All-Sky Survey (CLASS) have yielded a mean redshift of (z) = 1.27 with an rms spread of 0.95, at a completeness level of 64%. The sample consists of sources with a 5 GHz flux density of 25-50 mJy, making it the faintest flat-spectrum radio sample for which the redshift distribution has been studied. The spectra, obtained with the William Herschel Telescope, consist mainly of broad-line quasars at z > 1 and narrow-line galaxies at z <0.5. Though the mean redshift of flat-spectrum radio sources exhibits little variation over more than 2 orders of magnitude in radio flux density, there is evidence of a decreasing fraction of quasars at weaker flux levels. We present the results of our spectroscopic observations and discuss the implications for constraining cosmological parameters with statistical analyses of CLASS.

KW - gravitational lensing

KW - PHASE CALIBRATION SOURCES

KW - VLA ASTROMETRIC SURVEY

KW - CATALOG

M3 - Article

VL - 119

SP - 2629

EP - 2633

JO - The Astronomical Journal

JF - The Astronomical Journal

SN - 0004-6256

IS - 6

ER -

ID: 3876859