4098 galaxy clusters to z~0.6 in the Sloan Digital Sky Survey equatorial Stripe 82

Details 4098 galaxy clusters to z~0.6 in the Sloan Digital Sky Survey equatorial Stripe 82 4098 galaxy clusters to z~0.6 in the Sloan Digital Sky Survey equatorial Stripe 82

2011-01-24

arxiv.org/abs/1101.4585v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 2 figures, accepted for publication in MNRAS. Catalogues available at http://www.physics.mcgill.ca/~jimgeach/stripe8

Scientific paper

We present a catalogue of 4098 photometrically selected galaxy clusters with a median redshift = 0.32 in the 270 square degree 'Stripe 82' region of the Sloan Digital Sky Survey (SDSS), covering the celestial equator in the Southern Galactic Cap (-50 < RA < 59 deg, |Dec| < 1.25 deg). Owing to the multi-epoch SDSS coverage of this region, the ugriz photometry is ~2 magnitudes deeper than single scans within the main SDSS footprint. We exploit this to detect clusters of galaxies using an algorithm that searches for statistically significant overdensities of galaxies in a Voronoi tessellation of the projected sky. 32% of the clusters have at least one member with a spectroscopic redshift from existing public data (SDSS Data Release 7, 2SLAQ & WiggleZ), and the remainder have a robust photometric redshift (accurate to ~5-9% at the median redshift of the sample). The weighted average of the member galaxies' redshifts provides a reasonably accurate estimate of the cluster redshift. The cluster catalogue is publicly available for exploitation by the community to pursue a range of science objectives. In addition to the cluster catalogue, we provide a linked catalogue of 18,295 V<21 mag quasar sight-lines with impact parameters within <3 Mpc of the cluster cores selected from the catalogue of Veron et al. (2010). The background quasars cover 0.25 < z < 2, where MgII absorption-line systems associated with the clusters are detectable in optical spectra.

Affiliated with

Also associated with

No associations

Rating

4098 galaxy clusters to z~0.6 in the Sloan Digital Sky Survey equatorial Stripe 82 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 4098 galaxy clusters to z~0.6 in the Sloan Digital Sky Survey equatorial Stripe 82, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 4098 galaxy clusters to z~0.6 in the Sloan Digital Sky Survey equatorial Stripe 82 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-638103