Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-11-28
2001 ApJ 557 594
Astronomy and Astrophysics
Astrophysics
28 pages including 6 figures, ApJ submitted
Scientific paper
10.1086/322251
HST V and I-band observations show that the gravitational lens B1359+154 consists of six images of a single z_s=3.235 radio source and its star-forming host galaxy, produced by a compact group of galaxies at z_l = 1. VLBA observations at 1.7 GHz strongly support this conclusion, showing six compact cores with similar low-frequency radio spectra. B1359+154 is the first example of galaxy-scale gravitational lensing in which more than four images are observed of the same background source. The configuration is due to the unique lensing mass distribution: three primary lens galaxies lying on the vertices of a triangle separated by 0.7 arcsec (4/h kpc), inside the 1.7 arcsec diameter Einstein ring defined by the radio images. The gravitational potential has additional extrema within this triangle, creating a pair of central images that supplement the ``standard'' four-image geometry of the outer components. Simple mass models consisting of three lens galaxies constrained by HST and VLBA astrometry naturally reproduce the observed image positions but must be finely-tuned to fit the flux densities.
Falco Emilio E.
Impey Chris David
Keeton Charles R.
Kochanek Chris S.
Leh'ar Joseph
No associations
LandOfFree
B1359+154: A Six Image Lens Produced by a z=1 Compact Group of Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with B1359+154: A Six Image Lens Produced by a z=1 Compact Group of Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and B1359+154: A Six Image Lens Produced by a z=1 Compact Group of Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-398620