The new complex gravitational lens system HE 0230-2130

Details The new complex gravitational lens system HE 0230-2130 The new complex gravitational lens system HE 0230-2130

1999-07-16

arxiv.org/abs/astro-ph/9907227v1

Astronomy and Astrophysics

Astrophysics

4 pages, accepted by A&A, Letters to the Editor

Scientific paper

We report the discovery of the new gravitational lens system HE~0230$-$2130, a QSO at redshift $z=2.162$ consisting of at least five distinct components. Three of these are clearly lensed images of the QSO, one is most likely the lensing galaxy, while for the fifth component the identity is unclear: It could be a fourth QSO image (if so, then highly reddened), or another intervening galaxy, or a superposition of the two. Differential reddening seems to be important also for the first three QSO images. The surface density of faint galaxies near the QSO appears to be enhanced by a factor of $\ga 2$, indicating the presence of a distant cluster close to the line of sight.

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