Galaxy triplets in SDSS-DR7: I. Catalogue

Details Galaxy triplets in SDSS-DR7: I. Catalogue Galaxy triplets in SDSS-DR7: I. Catalogue

2011-11-29

arxiv.org/abs/1111.6971v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Accepted for publication in MNRAS. 13 pages, 20 figures

Scientific paper

We present a new catalogue of galaxy triplets derived from the Sloan Digital Sky Survey Data Release 7. The identification of systems was performed considering galaxies brighter than M_r=-20.5 and imposing constraints over the projected distances, radial velocity differences of neighbouring galaxies and isolation. To improve the identification of triplets we employed a data pixelization scheme, which allows to handle large amounts of data as in the SDSS photometric survey. Using spectroscopic and photometric data in the redshift range 0.01

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