Deep optical and radio observations of the gravitational lens system 2016 + 112

Abstract

view Abstract Citations (43) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Deep optical and radio observations of the gravitational lens system 2016+112. Schneider, D. P. ; Lawrence, C. R. ; Schmidt, M. ; Gunn, J. E. ; Turner, E. L. ; Burke, B. F. ; Dhawan, V. Abstract New optical and radio observations of the gravitational lens system 2016 + 112 are presented. Deep optical images reveal the presence of an extremely red galaxy located in the midst of the three radio positions. There is no evidence for a cluster of galaxies in the region; the lensing appears to be dominated by the new galaxy and the galaxy associated with the third radio source. The A image has remained constant in brightness since its discovery nearly a year ago, but B has faded by about 0.3 mag. A new spectrum of B shows that the equivalent widths of its emission lines have increased by roughly a factor of 2. A wide-field radio map shows that the postulated third image must either be more than 100 times fainter than A and B, or else lie close to one of the detected radio sources. The discovery of the new lensing mass makes the geometry of this lens system somewhat easier to understand, but no model based only on idealized mass distributions at the locations of the two known galaxies can explain all the observed properties. Publication: The Astrophysical Journal Pub Date: July 1985 DOI: 10.1086/163275 Bibcode: 1985ApJ...294...66S Keywords: Astronomical Photography; Astronomical Spectroscopy; Galactic Clusters; Gravitational Lenses; Quasars; Radio Astronomy; Charge Coupled Devices; Astrophysics full text sources ADS | data products SIMBAD (3) NED (1)