PMN J0134-0931: A gravitationally lensed quasar with an unusual radio morphology

Details PMN J0134-0931: A gravitationally lensed quasar with an unusual radio morphology PMN J0134-0931: A gravitationally lensed quasar with an unusual radio morphology

2001-07-23

arxiv.org/abs/astro-ph/0107435v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in ApJ. 19 pp., 5 figs. See also the preprint astro-ph/0107441 by Gregg et al., who discovered this o

Scientific paper

10.1086/324144

The radio-loud quasar PMN J0134-0931 was discovered to have an unusual morphology during our search for gravitational lenses. In VLA and MERLIN images, there are 5 compact components with maximum separation 681 millarcseconds. All of these components have the same spectral index from 5 GHz to 43 GHz. In a VLBA image at 1.7 GHz, a curved arc of extended emission joins two of the components in a manner suggestive of gravitational lensing. At least two of the radio components have near-infrared counterparts. We argue that this evidence implies that J0134-0931 is a gravitational lens, although we have not been able to devise a plausible model for the foreground gravitational potential. Like several other radio-loud lenses, the background source has an extraordinarily red optical counterpart.

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