X-ray cluster Abell 744

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/113872· OSTI ID:5612711

Kurtz, M J; Huchra, J P; Beers, T C; Geller, M J; Gioia, I M

X-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. 31 references.

• Research Organization: Harvard-Smithsonian Center for Astrophysics, Cambridge, MA
• OSTI ID: 5612711
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 90; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONFIGURATION
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELLIPTICAL CONFIGURATION
GALAXIES
GALAXY CLUSTERS
IONIZING RADIATIONS
PHOTOMETRY
RADIATIONS
RED SHIFT
SPATIAL DISTRIBUTION
VISIBLE RADIATION
X RADIATION