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Wide-angle radio tail QSOs as members of clusters of galaxies. II - Direct optical observations and spectroscopy of QSO fields (1984)

Hintzen, P.

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Publication Date: 2011-08-18

Description: Deep, direct observations are obtained for the fields of 19 QSOs (redshift values 0.3-1.5) whose 'excess' galaxy counts in 1.17-sq arcmin fields centered on the QSOs confirm QSO redshift cosmological interpretations at the 99-percent confidence level. It is in addition indicated with 97-percent confidence that wide angle radio tail QSOs lie in richer concentrations of galaxies than undistorted QSOs. The results obtained also confirm that the 'excess' galaxies detected in the QSO fields have the same redshifts as the QSOs. These observations indicate that deep CCD observations of the fields of radio tail QSOs would provide a sample of distant clusters of galaxies at known redshifts (those of the QSOs).

Keywords: ASTROPHYSICS

Type: Astrophysical Journal Supplement Series (ISSN 0067-0049); 55; 533-550

Format: text

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