The Vimos VLT Deep Survey: Stellar mass segregation and large-scale galaxy environment in the redshift range 0.2

M. Scodeggio , D. Vergani , O. Cucciati , A. Iovino , P. Franzetti , B. Garilli , F. Lamareille , M. Bolzonella , L. Pozzetti , U. Abbas , Christian Marinoni (1, 2) , T. Contini , D. Bottini , V. Le Brun , O. Le Fevre , D. Maccagni , R. Scaramella , L. Tresse , G. Vettolani , A. Zanichelli , C. Adami , S. Arnouts , S. Bardelli , A. Cappi , S. Charlot , P. Ciliegi , Sylvie Foucaud , I. Gavignaud , L. Guzzo , O. Ilbert , H. J. Mccracken , B. Marano , A. Mazure , B. Meneux , R. Merighi , S. Paltani , R. Pello , A. Pollo , M. Radovich , G. Zamorani , E. Zucca , M. Bondi , A. Bongiorno , J. Brinchmann , S. de La Torre , L. de Ravel , L. Gregorini , P. Memeo , E. Perez-Montero , Y. Mellier , S. Temporin , C. J. Walcher

1 CPT - Centre de Physique Théorique - UMR 6207
2 CPT - Centre de Physique Théorique - UMR 7332

Hierarchical models of galaxy formation predict that the properties of a dark matter halo depend on the large-scale environment surrounding the halo. As a result of this correlation, we expect massive haloes to be present in larger number in overdense regions than in underdense ones. Given that a correlation exists between a galaxy stellar mass and the hosting dark matter halo mass, the segregation in dark matter halo mass should then result in a segregation in the distribution of stellar mass in the galaxy population. In this work we study the distribution of galaxy stellar mass and rest-frame optical color as a function of the large-scale galaxy distribution using the VLT VIMOS Deep Survey sample, in order to verify the presence of segregation in the properties of the galaxy population. We use the VVDS redshift measurements and multi-band photometric data to derive estimates of the stellar mass, rest-frame optical color, and of the large-scale galaxy density, on a scale of approximately 8 Mpc, for a sample of 5619 galaxies in the redshift range 0.2

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

M. Scodeggio, D. Vergani, O. Cucciati, A. Iovino, P. Franzetti, et al.. The Vimos VLT Deep Survey: Stellar mass segregation and large-scale galaxy environment in the redshift range 0.2. Astronomy and Astrophysics - A&A, 2009, 501 (1), pp.21-27. ⟨hal-00374307⟩