Communication publiée dans un ouvrage (Colloques et congrès scientifiques)
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 :
Aérospatiale, astronomie & astrophysique
Auteur, co-auteur :
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
Langue du document :
Anglais
Titre :
A Search for Large-Image-Separation Gravitational Lenses in the JVAS Radio Survey
Date de publication/diffusion :
août 1998
Nom de la manifestation :
Large Scale Structure: Tracks and Traces: 12th Potsdam Cosmology Workshop : Potsdam, Germany, 15-19 September 1997
Organisateur de la manifestation :
AIP Potsdam
Lieu de la manifestation :
Potsdam, Allemagne
Date de la manifestation :
from 15-09-1997 to 19-09-1997
Manifestation à portée :
International
Titre de l'ouvrage principal :
Large Scale Structure: Tracks and Traces : Proceedings of the 12th Potsdam Cosmology Workshop : Potsdam, Germany, 15-19 September 1997
