Chandra Observations of SDSS J1004+4112: Constraints on the Lensing Cluster and Anomalous X-Ray Flux Ratios of the Quadruply Imaged Quasar
Abstract
We present results from Chandra observations of SDSS J1004+4112, a strongly lensed quasar system with a maximum image separation of 15". All four bright images of the quasar, as well as resolved X-ray emission originating from the lensing cluster, are clearly detected. The emission from the lensing cluster extends out to approximately 1.5 arcmin. We measure the bolometric X-ray luminosity and temperature of the lensing cluster to be 4.7×1044 ergs s-1 and 6.4 keV, consistent with the luminosity-temperature relation for distant clusters. The mass estimated from the X-ray observation shows excellent agreement with the mass derived from gravitational lensing. The X-ray flux ratios of the quasar images differ markedly from the optical flux ratios, and the combined X-ray spectrum of the images possesses an unusually strong Fe Kα emission line, both of which are indicative of microlensing.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2006
- DOI:
- 10.1086/505385
- arXiv:
- arXiv:astro-ph/0601700
- Bibcode:
- 2006ApJ...647..215O
- Keywords:
-
- Galaxies: Clusters: General;
- Cosmology: Gravitational Lensing;
- Galaxies: Quasars: Individual: Alphanumeric: SDSS J100434.91+411242.8;
- X-Rays: Galaxies;
- Astrophysics
- E-Print:
- 9 pages, 5 figures. Accepted for publication in ApJ. Version with high-quality color figures at http://cosmic.riken.jp/ota/publications/index.html