2009A&A...498L..33G


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.03CET09:30:31

2009A&A...498L..33G - Astronomy and Astrophysics, volume 498, L33-36 (2009/5-1)

A weak lensing study of the Coma cluster.

GAVAZZI R., ADAMI C., DURRET F., CUILLANDRE J.-C., ILBERT O., MAZURE A., PELLO R. and ULMER M.P.

Abstract (from CDS):

Due to observational constraints, dark matter determinations in nearby clusters based on weak lensing are still extremely rare, in spite of their importance for the determination of cluster properties independent of other methods. We present a weak lensing study of the Coma cluster (redshift∼0.024) based on deep images obtained at the CFHT. After obtaining photometric redshifts for the galaxies in our field based on deep images in the u* (1x1deg2), and in the B, V, R and I bands (42'x52'), allowing us to eliminate foreground galaxies, we apply weak lensing calculations on shape measurements performed in the u* image. We derive a map of the mass distribution in Coma, as well as the radial shear profile, and the mass and concentration parameter at various radii. We obtain M200c=5.1+4.3–2.1x1014h70–1M and c200c=5.0+3.2–2.5, in good agreement with previous measurements. With deep wide field images it is now possible to analyze nearby clusters with weak lensing techniques, thus opening a broad new field of investigation.

Abstract Copyright:

Journal keyword(s): gravitational lensing - galaxies: clusters: individual: Coma

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 [ABD2005] G12 GrG 12 57 38.2 +27 40 21           ~ 3 0
2 MLCG 0636 CGG 12 57 48.9 +27 52 01           ~ 4 0
3 [ABD2005] G9 GrG 12 58 51.4 +27 48 17           ~ 4 0
4 MLCG 1527 CGG 12 59 09.8 +27 46 39           ~ 5 0
5 NGC 4874 LIN 12 59 35.709 +27 57 33.80 13.01 13.7 11.40 12.122 11.386 ~ 730 3
6 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4319 2
7 NGC 4889 BiC 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 658 1
8 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 572 1
9 NAME CFA Great Wall SCG ~ ~           ~ 121 0

    Equat.    Gal    SGal    Ecl

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2021.03.03-09:30:31

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