The bimodality of the 10k zCOSMOS-bright galaxies up to z ~ 1: a new statistical and portable classification based on the optical galaxy properties
- Coppa, G.
- Mignoli, M.
- Zamorani, G.
- Bardelli, S.
- Lilly, S. J.
- Bolzonella, M.
- Scodeggio, M.
- Vergani, D.
- Nair, P.
- Pozzetti, L.
- Cimatti, Alessandro
- Zucca, E.
- Carollo, C. M.
- Contini, T.
- Fèvre, O. Le
- Renzini, A.
- Mainieri, V.
- Bongiorno, A.
- Caputi, K.
- Cucciati, O.
- de La Torre, S.
- de Ravel, L.
- Franzetti, P.
- Garilli, B.
- Memeo, P.
- Iovino, A.
- Kampczyk, P.
- Kneib, J. -P.
- Knobel, C.
- Koekemoer, A. M.
- Kovac, K.
- Lamareille, F.
- Borgne, J. -F. Le
- Brun, V. Le
- Maier, C.
- Pellò, R.
- Peng, Y.
- Perez-Montero, E.
- Ricciardelli, E.
- Scarlata, C.
- Silverman, J. D.
- Tanaka, M.
- Tasca, L.
- Tresse, L.
- Abbas, U.
- Bottini, D.
- Capak, P.
- Cappi, A.
- Cassata, P.
- Fumana, M.
- Guzzo, L.
- Leauthaud, A.
- Maccagni, D.
- Marinoni, Christian
- Meneux, B.
- Oesch, P.
- Porciani, C.
- Scaramella, R.
- Scoville, N.
DOIAbstract
16 pages, 14 figures, accepted for publication in A&AInternational audienceOur goal is to develop a new and reliable statistical method to classify galaxies from large surveys. We probe the reliability of the method by comparing it with a three-dimensional classification cube, using the same set of spectral, photometric and morphological parameters.We applied two different methods of classification to a sample of galaxies extracted from the zCOSMOS redshift survey, in the redshift range 0.5 0.5$, while galaxies with lower masses - of the order of $10^{10}$ Msun - are in transition at later epochs; galaxies with $M 5\cdot 10^{10}$ Msun) mostly completed their transition before $z\sim 1$
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