The CHANDRA view of the largest quasar LENS SDSSJ1029+2623

Naomi Ota; Masamune Oguri; Xinyu Dai; Christopher S. Kochanek; Gordon T. Richards; Eran O. Ofek; Rogerd Blandford; Tim Schrabback; Naohisa Inada

doi:https://doi.org/10.1088/0004-637X/758/1/26

The CHANDRA view of the largest quasar LENS SDSSJ1029+2623

Naomi Ota, Masamune Oguri, Xinyu Dai, Christopher S. Kochanek, Gordon T. Richards, Eran O. Ofek, Rogerd Blandford, Tim Schrabback, Naohisa Inada

Department of Particle Physics and Astrophysics

Weizmann Institute of Science

Research output: Contribution to journal › Article › peer-review

Abstract

We present results from Chandra observations of the cluster lens SDSSJ1029+2623 at z_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^+2.0 _{- 1.2}keV and bolometric luminosity of L _X = 9.6 × 10⁴⁴ erg s^-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.

Original language	English
Article number	26
Journal	Astrophysical Journal
Volume	758
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/758/1/26
State	Published - 10 Oct 2012

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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@article{d93a4db61c684952a1a10c42b9b4a5e9,

title = "The CHANDRA view of the largest quasar LENS SDSSJ1029+2623",

abstract = "We present results from Chandra observations of the cluster lens SDSSJ1029+2623 at zl = 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+2.0 - 1.2keV and bolometric luminosity of L X = 9.6 × 1044 erg s-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.",

author = "Naomi Ota and Masamune Oguri and Xinyu Dai and Kochanek, {Christopher S.} and Richards, {Gordon T.} and Ofek, {Eran O.} and Rogerd Blandford and Tim Schrabback and Naohisa Inada",

note = "Ministry of Education, Culture, Sports, Science and Technology [22740124]; World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan; JSPS [23740161]; NSF [AST-1009756, AST-0444059-001]; NASA/SAO [GO0-11147B]; Smithsonian Astrophysics Observatory [GO0-11147A]We thank K. Aoki for useful discussions, and an anonymous referee for many useful suggestions. This work was supported in part by the Grant-in-Aid for Scientific Research by the Ministry of Education, Culture, Sports, Science and Technology, No. 22740124 (N.O.). This work was supported in part by the FIRST program {"}Subaru Measurements of Images and Redshifts (SuMIRe),{"} World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan, and Grant-in-Aid for Scientific Research from the JSPS (23740161). C. S. K. is supported by NSF grant AST-1009756. X. D. acknowledges support by NASA/SAO fund GO0-11147B. T. S. acknowledges support from NSF through grant AST-0444059-001 and the Smithsonian Astrophysics Observatory through grant GO0-11147A.",

year = "2012",

month = oct,

day = "10",

doi = "https://doi.org/10.1088/0004-637X/758/1/26",

language = "الإنجليزيّة",

volume = "758",

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TY - JOUR

T1 - The CHANDRA view of the largest quasar LENS SDSSJ1029+2623

AU - Ota, Naomi

AU - Oguri, Masamune

AU - Dai, Xinyu

AU - Kochanek, Christopher S.

AU - Richards, Gordon T.

AU - Ofek, Eran O.

AU - Blandford, Rogerd

AU - Schrabback, Tim

AU - Inada, Naohisa

N1 - Ministry of Education, Culture, Sports, Science and Technology [22740124]; World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan; JSPS [23740161]; NSF [AST-1009756, AST-0444059-001]; NASA/SAO [GO0-11147B]; Smithsonian Astrophysics Observatory [GO0-11147A]We thank K. Aoki for useful discussions, and an anonymous referee for many useful suggestions. This work was supported in part by the Grant-in-Aid for Scientific Research by the Ministry of Education, Culture, Sports, Science and Technology, No. 22740124 (N.O.). This work was supported in part by the FIRST program "Subaru Measurements of Images and Redshifts (SuMIRe)," World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan, and Grant-in-Aid for Scientific Research from the JSPS (23740161). C. S. K. is supported by NSF grant AST-1009756. X. D. acknowledges support by NASA/SAO fund GO0-11147B. T. S. acknowledges support from NSF through grant AST-0444059-001 and the Smithsonian Astrophysics Observatory through grant GO0-11147A.

PY - 2012/10/10

Y1 - 2012/10/10

N2 - We present results from Chandra observations of the cluster lens SDSSJ1029+2623 at zl = 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+2.0 - 1.2keV and bolometric luminosity of L X = 9.6 × 1044 erg s-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.

AB - We present results from Chandra observations of the cluster lens SDSSJ1029+2623 at zl = 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+2.0 - 1.2keV and bolometric luminosity of L X = 9.6 × 1044 erg s-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.

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U2 - https://doi.org/10.1088/0004-637X/758/1/26

DO - https://doi.org/10.1088/0004-637X/758/1/26

M3 - مقالة

SN - 0004-637X

VL - 758

JO - Astrophysical Journal

JF - Astrophysical Journal

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M1 - 26

ER -

The CHANDRA view of the largest quasar LENS SDSSJ1029+2623

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