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

Abstract

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 {approx} 0.2. Located {approx}20'' away from the central galaxy is a secondary tangential arc feature which has been identified as a background galaxy with z {approx} 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{sup 13} M {sub sun} within 37 h {sup -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.

Authors:
; ; ; ; ; ; ;  [1];  [2]
  1. Gemini Observatory, Southern Operations Center, AURA, Casilla 603, La Serena (Chile)
  2. Departamento de FIsica y Astronomia, Universidad de ValparaIso, Avenida Gran Bretana 1111, ValparaIso (Chile)
Publication Date:
OSTI Identifier:
21448695
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 715; Journal Issue: 2; Other Information: DOI: 10.1088/2041-8205/715/2/L160; Journal ID: ISSN 2041-8205
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; GALACTIC EVOLUTION; GALAXIES; GALAXY CLUSTERS; MASS; UNIVERSE; EVOLUTION

Citation Formats

Carrasco, E R, Gomez, P L, Lee, H, Diaz, R, Bergmann, M, Turner, J E. H., Miller, B W, West, M J, and Verdugo, T. STRONG GRAVITATIONAL LENSING BY THE SUPER-MASSIVE cD GALAXY IN ABELL 3827. United States: N. p., 2010. Web. doi:10.1088/2041-8205/715/2/L160.
Carrasco, E R, Gomez, P L, Lee, H, Diaz, R, Bergmann, M, Turner, J E. H., Miller, B W, West, M J, & Verdugo, T. STRONG GRAVITATIONAL LENSING BY THE SUPER-MASSIVE cD GALAXY IN ABELL 3827. United States. https://doi.org/10.1088/2041-8205/715/2/L160
Carrasco, E R, Gomez, P L, Lee, H, Diaz, R, Bergmann, M, Turner, J E. H., Miller, B W, West, M J, and Verdugo, T. 2010. "STRONG GRAVITATIONAL LENSING BY THE SUPER-MASSIVE cD GALAXY IN ABELL 3827". United States. https://doi.org/10.1088/2041-8205/715/2/L160.
@article{osti_21448695,
title = {STRONG GRAVITATIONAL LENSING BY THE SUPER-MASSIVE cD GALAXY IN ABELL 3827},
author = {Carrasco, E R and Gomez, P L and Lee, H and Diaz, R and Bergmann, M and Turner, J E. H. and Miller, B W and West, M J and Verdugo, T},
abstractNote = {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 {approx} 0.2. Located {approx}20'' away from the central galaxy is a secondary tangential arc feature which has been identified as a background galaxy with z {approx} 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{sup 13} M {sub sun} within 37 h {sup -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.},
doi = {10.1088/2041-8205/715/2/L160},
url = {https://www.osti.gov/biblio/21448695}, journal = {Astrophysical Journal Letters},
issn = {2041-8205},
number = 2,
volume = 715,
place = {United States},
year = {Tue Jun 01 00:00:00 EDT 2010},
month = {Tue Jun 01 00:00:00 EDT 2010}
}