EVN/Global observations of the Gravitational Lens JVAS B0218+357 at 8.4 GHz

Details EVN/Global observations of the Gravitational Lens JVAS B0218+357 at 8.4 GHz EVN/Global observations of the Gravitational Lens JVAS B0218+357 at 8.4 GHz

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002evn..conf..199b&link_type=abstract

6th European VLBI Network Symposium on New Developments in VLBI Science and Technology, held in Bonn, June 25th-28th 2002, proce

Astronomy and Astrophysics

Astronomy

1

Scientific paper

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 μ Jy beam-1 and high resolution (˜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 β ≅1.04, in agreement with results from an independent dataset.

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