THE CHANDRA VIEW OF THE LARGEST QUASAR LENS SDSS J1029+2623
- Department of Physics, Nara Women's University, Kitauoyanishimachi, Nara, Nara 630-8506 (Japan)
- Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8568 (Japan)
- Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019 (United States)
- Department of Astronomy, The Ohio State University, Columbus, OH 43210 (United States)
- Department of Physics, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104 (United States)
- Benoziyo Center for Astrophysics, Weizmann Institute of Science, 76100 Rehovot (Israel)
- Kavli Institute for Particle Astrophysics and Cosmology, 2575 Sand Hill Rd., Menlo Park, CA 94309 (United States)
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305-4060 (United States)
- Department of Physics, Nara National College of Technology, Yamatokohriyama, Nara 639-1080 (Japan)
We present results from Chandra observations of the cluster lens SDSS J1029+2623 at z{sub l} = 0.58, which is a gravitationally lensed quasar with the largest known image separation. We clearly detect X-ray emission both from the lensing cluster and the three lensed quasar images. The cluster has an X-ray temperature of kT = 8.1{sup +2.0}{sub -1.2} keV and bolometric luminosity of L{sub X} = 9.6 Multiplication-Sign 10{sup 44} erg s{sup -1}. Its surface brightness is centered near one of the brightest cluster galaxies, and it is elongated east-west. We identify a subpeak northwest of the main peak, which is suggestive of an ongoing merger. Even so, the X-ray mass inferred from the hydrostatic equilibrium assumption appears to be consistent with the lensing mass from the Einstein radius of the system. We find significant absorption in the soft X-ray spectrum of the faintest quasar image, which can be caused by an intervening material at either the lens or source redshift. The X-ray flux ratios between the quasar images (after correcting for absorption) are in reasonable agreement with those at optical and radio wavelengths, and all the flux ratios are inconsistent with those predicted by simple mass models. This implies that microlensing effect is not significant for this system and dark matter substructure is mainly responsible for the anomalous flux ratios.
- OSTI ID:
- 22092107
- Journal Information:
- Astrophysical Journal, Vol. 758, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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