The zCOSMOS-Bright survey: The clustering of early and late galaxy morphological types since z≃ 1

S. de la Torre, O. Le Fèvre, C. Porciani, L. Guzzo, B. Meneux, U. Abbas, L. Tasca, C. M. Carollo, T. Contini, J. P. Kneib, S. J. Lilly, V. Mainieri, A. Renzini, M. Scodeggio, G. Zamorani, S. Bardelli, M. Bolzonella, A. Bongiorno, K. Caputi, G. CoppaO. Cucciati, L. de Ravel, P. Franzetti, B. Garilli, C. Halliday, A. Iovino, P. Kampczyk, C. Knobel, A. M. Koekemoer, K. Kovač, F. Lamareille, J. F. Le Borgne, V. Le Brun, C. Maier, M. Mignoli, R. Pelló, Y. Peng, E. Perez-Montero, E. Ricciardelli, J. Silverman, M. Tanaka, L. Tresse, D. Vergani, E. Zucca, D. Bottini, A. Cappi, P. Cassata, A. Cimatti, A. Leauthaud, D. Maccagni, C. Marinoni, H. J. Mccracken, P. Memeo, P. Oesch, L. Pozzetti, R. Scaramella

研究成果: Article査読

20 被引用数 (Scopus)

抄録

We measure the spatial clustering of galaxies as a function of their morphological type at z≃ 0.8, for the first time in a deep redshift survey with full morphological information. This is obtained by combining high-resolution Hubble Space Telescope imaging and Very Large Telescope spectroscopy for about 8500 galaxies to with accurate spectroscopic redshifts from the zCOSMOS-Bright redshift survey. At this epoch, early-type galaxies already show a significantly stronger clustering than late-type galaxies on all probed scales. A comparison to the Sloan Digital Sky Survey Data at z≃ 0.1 shows that the relative clustering strength between early and late morphological classes tends to increase with cosmic time at small separations, while on large scales it shows no significant evolution since z≃ 0.8. This suggests that most early-type galaxies had already formed in intermediate and dense environments at this epoch. Our results are consistent with a picture in which the relative clustering of different morphological types between z≃ 1 and 0 reflects the evolving role of environment in the morphological transformation of galaxies, on top of a global evolution driven by mass.

本文言語English
ページ(範囲)825-834
ページ数10
ジャーナルMonthly Notices of the Royal Astronomical Society
412
2
DOI
出版ステータスPublished - 2011 4
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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