Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..421..289s&link_type=abstract
Galaxies in Isolation: Exploring Nature Versus Nurture, proceedings of a conference held 12 to 15 May 2009 in Granada, Spain. Ed
Astronomy and Astrophysics
Astronomy
Scientific paper
A search for galaxy pairs was performed in the Sloan Digital Sky Survey, Data Release 6 (SDSS-DR6), using the SQL language. We have analyzed the isolation of these pairs, in a 0.5 h70-1 Mpc radius. The isolation criteria used are similar to the fossil group ones, where the difference in the r-band magnitude between the brightest galaxy of the pair and the next brightest galaxy is larger than 2, taking into account redshift constraints. Our results show that around 3.5% of all the pairs found in SDSS can be considered isolated, according to the r-band magnitude criterion. We also analyzed properties of the galaxies in the pair, such as their colors, classifying them in early or late types.
de Novais P. M.
de Oliveira Mendes Cl.
Santos Walter A.
Sodre Laerte Jr.
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