Discovering Mass Clumps in Distant Galaxies with Lensing: The Case of B1422+231
| dc.creator | Keeton, Charles R. | |
| dc.date | 2001-11-30 | |
| dc.date.accessioned | 2026-07-07T02:01:35Z | |
| dc.date.available | 2026-07-07T02:01:35Z | |
| dc.description | Substructure in distant gravitational lens galaxies can be detected because it alters the brightnesses and shapes of the lensed images. The optical and radio flux ratios in the four-image lens B1422+231 imply that there is a \sim 10^4-10^7 Msun/h mass clump in the lens galaxy in front of image A; this is the first constraint on the mass of a particular clump lying in a distant galaxy and detected by its mass. The data also indicate that a small clump, perhaps a star, is passing in front of image B and making the optical flux ratios variable. Both of these hypotheses can be tested with new observations. B1422+231 demonstrates how data at different wavelengths can be used in individual lenses to probe individual mass clumps in distant galaxies. | |
| dc.description | 4 pages, emulateapj; submitted to ApJL | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0111595 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0111595 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/3804 | |
| dc.subject | Astrophysics | |
| dc.title | Discovering Mass Clumps in Distant Galaxies with Lensing: The Case of B1422+231 | |
| dc.type | text |