The cluster of galaxies associated with the low-redshift quasar H1821+643

Donald P. Schneider, John N. Bahcall, James E. Gunn, Alan Dressler

Research output: Contribution to journalArticle

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Abstract

Low resolution spectra have been obtained of eight R ≈ 19 mag galaxies located within 1 arcmin of the low-redshift, high luminosity quasar H1821 + 643. Six of the eight galaxies belong to a cluster that has the same redshift, within the observational errors, as the quasar. Five of the six cluster members have the spectra of early type galaxies; the spectrum of the sixth cluster member contains Hα, O III], and possibly O II emission lines. The other two objects are an emission line foreground galaxy and a background galaxy. The cluster has a Galactocentric redshift of 0.299 ± 0.002 and a radial velocity dispersion of 1050 ± 320 km s-1. The photometric and spectroscopic data suggest that H1821 + 643 is associated with a rich cluster of galaxies.

Original languageEnglish (US)
Pages (from-to)1047-1050
Number of pages4
JournalAstronomical Journal
Volume103
Issue number4
DOIs
StatePublished - Jan 1 1992

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quasars
galaxies
radial velocity
luminosity

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Schneider, Donald P. ; Bahcall, John N. ; Gunn, James E. ; Dressler, Alan. / The cluster of galaxies associated with the low-redshift quasar H1821+643. In: Astronomical Journal. 1992 ; Vol. 103, No. 4. pp. 1047-1050.
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The cluster of galaxies associated with the low-redshift quasar H1821+643. / Schneider, Donald P.; Bahcall, John N.; Gunn, James E.; Dressler, Alan.

In: Astronomical Journal, Vol. 103, No. 4, 01.01.1992, p. 1047-1050.

Research output: Contribution to journalArticle

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T1 - The cluster of galaxies associated with the low-redshift quasar H1821+643

AU - Schneider, Donald P.

AU - Bahcall, John N.

AU - Gunn, James E.

AU - Dressler, Alan

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Y1 - 1992/1/1

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AB - Low resolution spectra have been obtained of eight R ≈ 19 mag galaxies located within 1 arcmin of the low-redshift, high luminosity quasar H1821 + 643. Six of the eight galaxies belong to a cluster that has the same redshift, within the observational errors, as the quasar. Five of the six cluster members have the spectra of early type galaxies; the spectrum of the sixth cluster member contains Hα, O III], and possibly O II emission lines. The other two objects are an emission line foreground galaxy and a background galaxy. The cluster has a Galactocentric redshift of 0.299 ± 0.002 and a radial velocity dispersion of 1050 ± 320 km s-1. The photometric and spectroscopic data suggest that H1821 + 643 is associated with a rich cluster of galaxies.

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