EVN/Global observations of the Gravitational Lens JVAS B0218+357 at 8.4 GHz
ADS bibcode 2002evlb.conf..199B
A. D. Biggs [1,2], O. Wucknitz [1,3,5],
R. W. Porcas [4], I. W. A. Browne [1], N. J. Jackson [1], S. Mao [1],
P. N. Wilkinson [1]
- University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL, UK
- Joint Institute for VLBI in Europe, Postbus 2, 7990 AA Dwingeloo, Netherlands
- Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
- Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
- present address: Universität Potsdam, Institut für Physik, Am Neuen Palais 10, 14469 Potsdam
Abstract
We present new observations of the gravitational lens system JVAS B0218+357 made with a global VLBI network at 8.4 GHz. Our maps have an rms noise of 30 mu Jy / beam and high resolution (ca. 1 mas), permitting us to detect more of the extended structure of the radio jets in the A and B images. We can identify several sub-components common to both images with the expected parity reversal, including a possible counter-jet. We do not detect either the core of the lensing galaxy or any third image. Using a model of the lensing galaxy, we have back-projected both images to the source plane and find that they agree well. However, there are small, but significant, differences and we discuss their possible origins. We find an exponent of the radial mass distribution of ca. beta=1.04, in agreement with results from an independent dataset.
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ADS bibcode 2002evlb.conf..199B (link to ADS entry)
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