Paper published in a book (Scientific congresses and symposiums)
A Search for Large-Image-Separation Gravitational Lenses in the JVAS Radio Survey
Marlow, Daniel R.; McGuinness, , Alexander D.; Browne, Ian William Allanet al.
1998 • In Müller, Volker; Gottlöber, Stefan; Mücket, Jan Peteret al. (Eds.) Large Scale Structure: Tracks and Traces : Proceedings of the 12th Potsdam Cosmology Workshop : Potsdam, Germany, 15-19 September 1997
[en] Gravitational lensing directly measures fluctuations in the gravitational potential along paths to distant objects. Currently, there are no firm examples of radio selected lens systems with image separations >7'', but many with separations <7''. We have made use of the approximately 2500 flat-spectrum radio sources that make up JVAS (the Jodrell Bank VLA Astrometric Survey) (Patnaik et al. 1992 and papers in preparation) to select wide-separation (>6'') gravitational lens candidates. Lensing of flat-spectrum radio sources is relatively easy to recognise since the source structures are point-dominated. In the original JVAS analysis, no attempt was made to look for lenses with separations >6'', so this is a new search. The secondary components will be lensed images or part of the source structure or less probably, simply chance sources nearby.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Marlow, Daniel R.; NRAL Jodrell Bank, Macclesfield, Cheshire SK11 9DL England
McGuinness, , Alexander D.; NRAL Jodrell Bank, Macclesfield, Cheshire SK11 9DL England
Browne, Ian William Allan; NRAL Jodrell Bank, Macclesfield, Cheshire SK11 9DL England
Wilkinson, Peter N.; NRAL Jodrell Bank, Macclesfield, Cheshire SK11 9DL England
Helbig, Phillip ; NRAL Jodrell Bank, Macclesfield, Cheshire SK11 9DL England
Language :
English
Title :
A Search for Large-Image-Separation Gravitational Lenses in the JVAS Radio Survey
Publication date :
August 1998
Event name :
Large Scale Structure: Tracks and Traces: 12th Potsdam Cosmology Workshop : Potsdam, Germany, 15-19 September 1997
Event organizer :
AIP Potsdam
Event place :
Potsdam, Germany
Event date :
from 15-09-1997 to 19-09-1997
Audience :
International
Main work title :
Large Scale Structure: Tracks and Traces : Proceedings of the 12th Potsdam Cosmology Workshop : Potsdam, Germany, 15-19 September 1997