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The X-ray cluster Abell 744X-ray and optical observations of the cluster of galaxies Abell 744 are presented. The X-ray flux (assuming H(0) = 100 km/s per Mpc) is about 9 x 10 to the 42nd erg/s. The X-ray source is extended, but shows no other structure. Photographic photometry (in Kron-Cousins R), calibrated by deep CCD frames, is presented for all galaxies brighter than 19th magnitude within 0.75 Mpc of the cluster center. The luminosity function is normal, and the isopleths show little evidence of substructure near the cluster center. The cluster has a dominant central galaxy, which is classified as a normal brightest-cluster elliptical on the basis of its luminosity profile. New redshifts were obtained for 26 galaxies in the vicinity of the cluster center; 20 appear to be cluster members. The spatial distribution of redshifts is peculiar; the dispersion within the 150 kpc core radius is much greater than outside. Abell 744 is similar to the nearby cluster Abell 1060.
Document ID
19850064803
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kurtz, M. J.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Huchra, J. P.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Beers, T. C.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Geller, M. J.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Gioia, I. M.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1985
Publication Information
Publication: Astronomical Journal
Volume: 90
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
85A46954
Funding Number(s)
CONTRACT_GRANT: NAS8-30751
CONTRACT_GRANT: NAGW-201
Distribution Limits
Public
Copyright
Other

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