A REDSHIFT SURVEY OF THE STRONG-LENSING CLUSTER ABELL 383

被引：35

作者：

Geller, Margaret J. ^{[1
]}

Hwang, Ho Seong ^{[1
]}

Diaferio, Antonaldo ^{[2
,3
]}

Kurtz, Michael J. ^{[1
]}

Coe, Dan ^{[4
]}

Rines, Kenneth J. ^{[5
]}

机构：

[1] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA

[2] Univ Torino, Dipartimento Fis, I-10125 Turin, Italy

[3] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[4] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[5] Western Washington Univ, Dept Phys & Astron, Bellingham, WA 98225 USA

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 783卷 / 01期

关键词：

dark matter; galaxies: clusters: individual (Abell 3833); galaxies: distances and redshifts; galaxies:kinematics and dynamics; gravitational lensing: weak; LUMINOUS GALAXY CLUSTERS; DARK-MATTER HALOES; DIGITAL SKY SURVEY; MASS PROFILES; DENSITY PROFILES; INFALL PATTERNS; OUTER REGIONS; SDSS-III; VELOCITY; CONSTRAINTS;

D O I：

10.1088/0004-637X/783/1/52

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Abell 383 is a famous rich cluster (z = 0.1887) imaged extensively as a basis for intensive strong-and weak-lensing studies. Nonetheless, there are few spectroscopic observations. We enable dynamical analyses by measuring 2360 new redshifts for galaxies with r(Petro) <= 20.5 and within 50' of the Brightest Cluster Galaxy (BCG; R. A.(2000) = 42 degrees.014125, decl.(2000) = -03 degrees.529228). We apply the caustic technique to identify 275 cluster members within 7h(-1) Mpc of the hierarchical cluster center. The BCG lies within -11 +/- 110 km s(-1) and 21 +/- 56 h(-1) kpc of the hierarchical cluster center; the velocity dispersion profile of the BCG appears to be an extension of the velocity dispersion profile based on cluster members. The distribution of cluster members on the sky corresponds impressively with the weak-lensing contours of Okabe et al. especially when the impact of foreground and background structure is included. The values of R-200 = 1.22 +/- 0.01 h(-1) Mpc and M-200 = (5.07 +/- 0.09) x 10(14) h(-1)M(circle dot) obtained by application of the caustic technique agree well with recent completely independent lensing measures. The caustic estimate extends direct measurement of the cluster mass profile to a radius of similar to 5 h(-1) Mpc.

引用

页数：11

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