Astronomy and Astrophysics – Astronomy
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..139h&link_type=abstract
Nature (ISSN 0028-0836), vol. 321, May 8, 1986, p. 139-142. Research supported by the University of Hawaii.
Astronomy and Astrophysics
Astronomy
22
Gravitational Lenses, Quasars, Astronomical Spectroscopy, Brightness, Galaxies, Image Analysis
Scientific paper
A search for a gravitational lensing object is reported. The 'triple' quasar, PG1114+08 (which actually contains at least four objects: A1, A2, B and C) was the second gravitational lens object to be found (Weyman, 1980). But because of its small angular scale (less than 2.5 arcsec separation between the components) and lack of detectable radio emission, which precludes the use of high-resolution interferometric radio techniques, not much is known about this object. In particular, the lensing object(s) have not been identified. Imaging observations made on a night of exceptional seeing are reported, along with spectroscopy of two galaxies near the quasar. It is found that there is a galaxy centered approximately midway between the two A components. The properties of this galaxy are consistent with it being the brightest member of a small group at a group redshift of 0.305. Although detailed modeling is required, it is likely that the galaxy and its group are the lenses.
Heasley James N. Jr.
Henry Patrick J.
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