ROSAT-SDSS Galaxy Clusters Survey. I. The Catalog and the correlation of X-ray and optical properties

Details ROSAT-SDSS Galaxy Clusters Survey. I. The Catalog and the correlation of X-ray and optical properties ROSAT-SDSS Galaxy Clusters Survey. I. The Catalog and the correlation of X-ray and optical properties

2004-03-15

arxiv.org/abs/astro-ph/0403354v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A&A, 47 pages, 19 figures

Scientific paper

10.1051/0004-6361:20035818

For a detailed comparison of the appearance of cluster of galaxies in X-rays and in the optical, we have compiled a comprehensive database of X-ray and optical properties of a sample of clusters based on the largest available X-ray and optical surveys: the ROSAT All Sky Survey (RASS) and the Sloan Digital Sky Survey (SDSS). The X-ray galaxy clusters of this RASS-SDSS catalog cover a wide range of masses, from groups of 10^{12.5} solar masses to massive clusters of 10^{15} solar masses in the redshift range from 0.002 to 0.45. The RASS-SDSS sample comprises all the X-ray selected objects already observed by the Sloan Digital Sky Survey (114 clusters). For each system we have uniformly determined the X-ray and optical properties. The total optical luminosity can be determined with a typical uncertainty of 20% with a result independent of the choice of local or global background subtraction. We found that the z band cluster luminosity determined within an aperture of 0.5 Mpc h_{70}^(-1) provides the best correlation with the X-ray luminosity with a scatter of about 60-70%. The scatter decreases to less than 40% if the correlation is limited to the bright X-ray clusters. The resulting correlation of L_X and L_{op} in the z and i bands shows a logarithmic slope of 0.38, a value not consistent with the assumption of a constant M/L. Consistency is found, however, for an increasing M/L with luminosity as suggested by other observations. We also investigated the correlation between L_{op} and the X-ray temperature obtaining the same result.

Affiliated with

Also associated with

No associations

Rating

ROSAT-SDSS Galaxy Clusters Survey. I. The Catalog and the correlation of X-ray and optical properties 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 ROSAT-SDSS Galaxy Clusters Survey. I. The Catalog and the correlation of X-ray and optical properties, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ROSAT-SDSS Galaxy Clusters Survey. I. The Catalog and the correlation of X-ray and optical properties will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-573707