Article (Scientific journals)
Observations of radio-quiet quasars at 10-mas resolution by use of gravitational lensing
Jackson, Neal; Tagore, Amitpal S.; Roberts, Carl et al.
2015In Monthly Notices of the Royal Astronomical Society, 454, p. 287-298
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Originally published in MNRAS, https://academic.oup.com/mnras/article/454/1/287/1135372


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Keywords :
gravitational lensing: strong; quasars: general; radio continuum: galaxies
Abstract :
[en] We present Very Large Array detections of radio emission in 4 four-image gravitational lens systems with quasar sources: HS 0810+2554, RX J0911+0511, HE 0435-1223 and SDSS J0924+0219, and extended Multi-Element Remote Linked Interferometer (e-MERLIN) observations of two of the systems. The first three are detected at a high level of significance, and SDSS J0924+0219 is detected. HS 0810+2554 is resolved, allowing us for the first time to achieve 10-mas resolution of the source frame in the structure of a radio-quiet quasar. The others are unresolved or marginally resolved. All four objects are among the faintest radio sources yet detected, with intrinsic flux densities in the range 1-5 μJy; such radio objects, if unlensed, will only be observable routinely with the Square Kilometre Array. The observations of HS 0810+2554, which is also detected with e-MERLIN, strongly suggest the presence of a mini active galactic nucleus, with a radio core and milliarcsecond scale jet. The flux densities of the lensed images in all but HE 0435-1223 are consistent with smooth galaxy lens models without the requirement for smaller scale substructure in the model, although some interesting anomalies are seen between optical and radio flux densities. These are probably due to microlensing effects in the optical.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Jackson, Neal;  Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Turing Building, Oxford Road, Manchester M13 9PL, UK
Tagore, Amitpal S.;  Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Turing Building, Oxford Road, Manchester M13 9PL, UK
Roberts, Carl;  Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Turing Building, Oxford Road, Manchester M13 9PL, UK
Sluse, Dominique  ;  Université de Liège - ULiège
Stacey, Hannah;  Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Turing Building, Oxford Road, Manchester M13 9PL, UK
Vives-Arias, Hector;  Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Turing Building, Oxford Road, Manchester M13 9PL, UK ; Departamento de Astronomía y Astrofísica, Universidad de Valencia, E-46100 Burjassot, Valencia, Spain
Wucknitz, Olaf;  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
Volino, Filomena;  Argelander Institut für Astronomie, Auf dem Hügel 69, D-53121 Bonn, Germany)
Language :
English
Title :
Observations of radio-quiet quasars at 10-mas resolution by use of gravitational lensing
Publication date :
01 November 2015
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
Oxford University Press, Oxford, United Kingdom
Volume :
454
Pages :
287-298
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 October 2015

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