Detection of a distant cluster in the center of the shear field in Q 2345 + 007

Details Detection of a distant cluster in the center of the shear field in Q 2345 + 007 Detection of a distant cluster in the center of the shear field in Q 2345 + 007

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...289l..15m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 289, no. 1, p. L15-L18

Astronomy and Astrophysics

Astrophysics

22

Cosmology, Faint Objects, Galactic Clusters, Galaxies, Gravitational Lenses, Quasars, Red Shift, Alignment, Astronomical Photometry, Brightness Distribution, Charge Coupled Devices, Color, Density (Number/Volume), Image Analysis

Scientific paper

We report on the detection of an excess of faint blue galaxies located in the center of the shear field detected by Bonnet et al. (1993). By using ultra-deep B and I CCD images obtained at the prime focus of Canada-France-Hawaii Telescope (CFHT), we computed isopleth contour maps by color intervals and found an excess of blue galaxies exactly centered on the center of the shear field (found by Bonnet et al.), with a small additional clump close to the double quasar. The angular size of the region with the density excess, as well as the color and surface brightness of the galaxies are evidences that we have detected a cluster of galaxies at redshift larger than 1. The faint blue galaxies are not distorted (no detectable shear) as expected for a lens responsible for the shear pattern. We discuss the consequences on the distance of the faintest sheared galaxies and on the usefullness of the weak shear technique for cosmology.

Affiliated with

Also associated with

No associations

Rating

Detection of a distant cluster in the center of the shear field in Q 2345 + 007 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 Detection of a distant cluster in the center of the shear field in Q 2345 + 007, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of a distant cluster in the center of the shear field in Q 2345 + 007 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1786778