Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-12-20
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
9 pages, 10 figures, accepted for publication in A&A
Scientific paper
10.1051/0004-6361/201118687
Aims. We intend to compile a new galaxy group and cluster sample of the latest available SDSS data, adding several parameter for the purpose of studying the supercluster network, galaxy and group evolution, and their connection to the surrounding environment. Methods. We used a modified friends-of-friends (FoF) method with a variable linking length in the transverse and radial directions to eliminate selection effects and to find reliably as many groups as possible. Using the galaxies as a basis, we calculated the luminosity density field. Results. We create a new catalogue of groups and clusters for the SDSS data release 8 sample. We find and add environmental parameters to our catalogue, together with other galaxy parameters (e.g., morphology), missing from our previous catalogues. We take into account various selection effects caused by a magnitude limited galaxy sample. Our final sample contains 576493 galaxies and 77858 groups. The group catalogue is available at http://www.aai.ee/~elmo/dr8groups/ and from the Strasbourg Astronomical Data Center (CDS).
Liivam"agi L. J.
Tago Erik
Tempel Elmo
No associations
LandOfFree
Groups and clusters of galaxies in the SDSS DR8. Value-added catalogues 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 Groups and clusters of galaxies in the SDSS DR8. Value-added catalogues, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Groups and clusters of galaxies in the SDSS DR8. Value-added catalogues will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-56140