Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209

Details Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209 Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209

2007-01-28

arxiv.org/abs/astro-ph/0701799v2

Astronomy and Astrophysics

Astrophysics

accepted by A&A, 15 pages, 11 figures

Scientific paper

10.1051/0004-6361:20066994

Weak lensing applied to deep optical images of clusters of galaxies provides a powerful tool to reconstruct the distribution of the gravitating mass associated to these structures. We use the shear signal extracted by an analysis of deep exposures of a region centered around the galaxy cluster Abell 209, at redshift z=0.2, to derive both a map of the projected mass distribution and an estimate of the total mass within a characteristic radius. We use a series of deep archival R-band images from CFHT-12k, covering an area of 0.3 deg^2. We determine the shear of background galaxy images using a new implementation of the modified Kaiser-Squires-Broadhurst pipeline for shear determination, which we has been tested against the ``Shear TEsting Program 1 and 2'' simulations. We use mass aperture statistics to produce maps of the 2 dimensional density distribution, and parametric fits using both Navarro-Frenk-White (NFW) and singular-isothermal-sphere profiles to constrain the total mass. The projected mass distribution shows a pronounced asymmetry, with an elongated structure extending from the SE to the NW. This is in general agreement with the optical distribution previously found by other authors. A similar elongation was previously detected in the X-ray emission map, and in the distribution of galaxy colours. The circular NFW mass profile fit gives a total mass of M_{200} = 7.7^{+4.3}_{-2.7} 10^{14} solar masses inside the virial radius r_{200} = 1.8\pm 0.3 Mpc. The weak lensing profile reinforces the evidence for an elongated structure of Abell 209, as previously suggested by studies of the galaxy distribution and velocities.

Affiliated with

Also associated with

No associations

Rating

Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-197066