| Title: |
Observations of radio-quiet quasars at 10mas resolution by use of gravitational lensing |
| Authors: |
Jackson, Neal, Tagore, Amitpal S., Roberts, Carl, Sluse, Dominique, Stacey, Hannah, Vives-Arias, Hector, Wucknitz, Olaf, Volino, Filomena |
| Publication Year: |
2015 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics |
| More Details: |
We present VLA detections of radio emission in four four-image gravitational lens systems with quasar sources: HS0810+2554, RXJ0911+0511, HE0435$-$1223 and SDSSJ0924+0219, and e-MERLIN observations of two of the systems. The first three are detected at a high level of significance, and SDSS J0924+0219 is detected. HS0810+2554 is resolved, allowing us for the first time to achieve 10-mas resolution of the source frame in the structure of a radio quiet quasar. The others are unresolved or marginally resolved. All four objects are among the faintest radio sources yet detected, with intrinsic flux densities in the range 1-5$\mu$Jy; such radio objects, if unlensed, will only be observable routinely with the Square Kilometre Array. The observations of HS0810+2554, which is also detected with e-MERLIN, strongly suggest the presence of a mini-AGN, with a radio core and milliarcsecond scale jet. The flux densities of the lensed images in all but HE0435-1223 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.
Comment: Accepted by MNRAS |
| Document Type: |
Working Paper |
| DOI: |
10.1093/mnras/stv1982 |
| Access URL: |
http://arxiv.org/abs/1508.05842 |
| Accession Number: |
edsarx.1508.05842 |
| Database: |
arXiv |
