eCite Digital Repository

The Quintuple Quasar: Radio and Optical Observations


Winn, JN and Kochanek, CS and Keeton, CR and Lovell, JEJ, The Quintuple Quasar: Radio and Optical Observations, The Astrophysical Journal, 590, (1 I) pp. 26-38. ISSN 0004-637X (2003) [Refereed Article]

DOI: doi:10.1086/374832


We present results from high-resolution radio and optical observations of PMN J0134-0931, a gravitational lens with a unique radio morphology and an extremely red optical counterpart. Our data support the theory of Keeton & Winn: five of the six observed radio components are multiple images of a single quasar, produced by a pair of lens galaxies. Multifrequency Very Long Baseline Array maps show that the sixth and faintest component has a different radio spectrum than the others, confirming that it represents a second component of the background source rather than a sixth image. The lens models predict that there should be additional faint images of this second source component, and we find evidence for one of the predicted images. The previously observed large angular sizes of two of the five bright components are not intrinsic (which would have excluded the possibility that they are lensed images) but are instead due to scatter broadening. Both the extended radio emission observed at low frequencies and the intrinsic image shapes observed at high frequencies can be explained by the lens models. The pair of lens galaxies is marginally detected in Rubble Space Telescope images. The differential extinction of the quasar images suggests that the extreme red color of the quasar is at least partly due to dust in the lens galaxies.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Lovell, JEJ (Dr Jim Lovell)
ID Code:45343
Year Published:2003
Web of Science® Times Cited:19
Deposited By:Physics
Deposited On:2007-07-11
Last Modified:2007-07-11

Repository Staff Only: item control page