STRONG GRAVITATIONAL LENSING BY THE SUPER-MASSIVE cD GALAXY IN ABELL 3827

被引：26

作者：

Carrasco, E. R. ^{[1
]}

Gomez, P. L. ^{[1
]}

Verdugo, T. ^{[2
]}

Lee, H. ^{[1
]}

Diaz, R. ^{[1
]}

Bergmann, M. ^{[1
]}

Turner, J. E. H. ^{[1
]}

Miller, B. W. ^{[1
]}

West, M. J. ^{[1
]}

机构：

[1] Gemini Observ, So Operat Ctr, AURA, La Serena, Chile

[2] Univ Valparaiso, Dept Fis & Astron, Valparaiso, Chile

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2010年 / 715卷 / 02期

关键词：

galaxies: clusters: individual (Abell 3827); galaxies: elliptical and lenticular; cD; galaxies: evolution; galaxies: formation; gravitational lensing: strong; BRIGHTEST CLUSTER GALAXIES; BAUTZ-MORGAN-TYPE; DRY MERGERS; ELLIPTIC GALAXIES; RED MERGERS; EVOLUTION;

D O I：

10.1088/2041-8205/715/2/L160

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have discovered strong gravitational lensing features in the core of the nearby cluster Abell 3827 by analyzing Gemini South GMOS images. The most prominent strong lensing feature is a highly magnified, ring-shaped configuration of four images around the central cD galaxy. GMOS spectroscopic analysis puts this source at z similar to 0.2. Located similar to 20 '' away from the central galaxy is a secondary tangential arc feature which has been identified as a background galaxy with z similar to 0.4. We have modeled the gravitational potential of the cluster core, taking into account the mass from the cluster, the brightest cluster galaxy (BCG), and other galaxies. We derive a total mass of (2.7 +/- 0.4) x 10(13) M(circle dot) within 37 h(-1) kpc. This mass is an order of magnitude larger than that derived from X-ray observations. The total mass derived from lensing data suggests that the BCG in this cluster is perhaps the most massive galaxy in the nearby universe.

引用

页码：L160 / L164

页数：5

共 31 条

[1] MEASURES OF LOCATION AND SCALE FOR VELOCITIES IN CLUSTERS OF GALAXIES - A ROBUST APPROACH [J].

BEERS, TC ;

FLYNN, K ;

GEBHARDT, K .

ASTRONOMICAL JOURNAL, 1990, 100 (01) :32-46

[2] Dry mergers in gems:: The dynamical evolution of massive early-type galaxies [J].

Bell, EF ;

Naab, T ;

McIntosh, DH ;

Somerville, RS ;

Caldwell, JAR ;

Barden, M ;

Wolf, C ;

Rix, HW ;

Beckwith, SV ;

Borch, A ;

Häussler, B ;

Heymans, C ;

Jahnke, K ;

Jogee, S ;

Koposov, S ;

Meisenheimer, K ;

Peng, CY ;

Sanchez, SF ;

Wisotzki, L .

ASTROPHYSICAL JOURNAL, 2006, 640 (01) :241-251

[3] SExtractor: Software for source extraction [J].

Bertin, E ;

Arnouts, S .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1996, 117 (02) :393-404

[4] Unlensing multiple arcs in 0024+1654: Reconstruction of the source image [J].

Colley, WN ;

Tyson, JA ;

Turner, EL .

ASTROPHYSICAL JOURNAL, 1996, 461 (02) :L83-+

[5] The hierarchical formation of the brightest cluster galaxies [J].

De Lucia, Gabriella ;

Blaizot, Jeremy .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 375 (01) :2-14

[6] The origin of the brightest cluster galaxies [J].

Dubinski, J .

ASTROPHYSICAL JOURNAL, 1998, 502 (01) :141-149

[7]

Eliasdottir A., 2007, ARXIV07105636

[8] ARC(LET)S IN CLUSTERS OF GALAXIES [J].

FORT, B ;

MELLIER, Y .

ASTRONOMY AND ASTROPHYSICS REVIEW, 1994, 5 (04) :239-292

[9] Mass distribution in the most X-ray-luminous galaxy cluster RX J1347.5-1145 studied with XMM-Newton [J].

Gitti, M. ;

Piffaretti, R. ;

Schindler, S. .

ASTRONOMY & ASTROPHYSICS, 2007, 472 (02) :383-394

[10] The mass distribution of RX J1347-1145 from strong lensing [J].

Halkola, A. ;

Hildebrandt, H. ;

Schrabback, T. ;

Lombardi, M. ;

Bradac, M. ;

Erben, T. ;

Schneider, P. ;

Wuttke, D. .

ASTRONOMY & ASTROPHYSICS, 2008, 481 (01) :65-U3

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