Detection of an apparent, distant cluster of galaxies associated with the radio-tail QSO 3C 275. 1

Journal Article · Fri May 15 04:00:00 EDT 1981 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/183541· OSTI ID:6295521

Hintzen, P; Boeshaar, G O; Scott, J S

Based on the suggestion that QSOs with distorted radio structures are likely to be members of clusters of galaxies (Hintzen and Scott), we have obtained deep direct observations of the fields containing 3C 270.1 and 3C 275.1, the most reliably substantiated cases of wide-angle radio tails associated with QSOs. Our 75'' square field centered on 3C 275.1 (z = 0.557) contains over three-dozen objects, many of which are nonstellar, between m/sub R/ = 19.8 and m/sub R/ = 23.5. The quasar itself lies at the center of an illiptical nebulosity. The size of this nebulosity and the magnitude distribution of the surrounding objects are consistent with the interpretation that the QSO is the nucleus of a giant elliptical galaxy which is a member of a cluster of galaxies at zapprox.0.55. Our observations of 3C 270.1 (z = 1.519) show no definitive evidence of an associated cluster of galaxies, which is consistent with the cosmological interpretation of QSO redshifts.

• Research Organization: Laboratory for Astonomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, Maryland
• OSTI ID: 6295521
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 246:1; ISSN AJLEA
• 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
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
GALAXIES
GALAXY CLUSTERS
QUASARS
RADIATIONS
RADIO GALAXIES
RADIOWAVE RADIATION
RED SHIFT