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Superdense massive galaxies in the eso distant cluster survey (EDisCS)

(2010) ASTROPHYSICAL JOURNAL LETTERS. 721(1). p.L19-L23
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Abstract
We find a significant number of massive and compact galaxies in clusters from the ESO Distant Clusters Survey (EDisCS) at 0.4 < z < 1. They have similar stellar masses, ages, sizes, and axial ratios to local z similar to 0.04 compact galaxies in WIde field Nearby Galaxy clusters Survey (WINGS) clusters, and to z = 1.4-2 massive and passive galaxies found in the general field. If non-brightest cluster galaxies of all densities, morphologies, and spectral types are considered, the median size of EDisCS galaxies is only a factor 1.18 smaller than in WINGS. We show that for morphologically selected samples, the morphological evolution taking place in a significant fraction of galaxies during the last Gyr may introduce an apparent, spurious evolution of size with redshift, which is actually due to intrinsic differences in the selected samples. We conclude that the median mass-size relation of cluster galaxies does not evolve significantly from z similar to 0.7 to z similar to 0.04. In contrast, the masses and sizes of BCGs and galaxies with M-* > 4 x 10(11) M-circle dot have significantly increased by a factor of 2 and 4, respectively, confirming the results of a number of recent works on the subject. Our findings show that progenitor bias effects play an important role in the size-growth paradigm of massive and passive galaxies.
Keywords
HIGH-REDSHIFT GALAXIES, VELOCITY DISPERSIONS, STAR-FORMATION HISTORIES, MORPHOLOGY-DENSITY RELATION, ELLIPTIC GALAXIES, SIZE EVOLUTION, SPECTROSCOPY, WINGS, DEPENDENCE, Z-SIMILAR-TO-1, galaxies: clusters: general, galaxies: evolution, galaxies: formation, galaxies: structure

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Chicago
Valentinuzzi, T, BM Poggianti, RP Saglia, A Aragon-Salamanca, L Simard, P Sanchez-Blazquez, M D’onofrio, et al. 2010. “Superdense Massive Galaxies in the Eso Distant Cluster Survey (EDisCS).” Astrophysical Journal Letters 721 (1): L19–L23.
APA
Valentinuzzi, T., Poggianti, B., Saglia, R., Aragon-Salamanca, A., Simard, L., Sanchez-Blazquez, P., D’onofrio, M., et al. (2010). Superdense massive galaxies in the eso distant cluster survey (EDisCS). ASTROPHYSICAL JOURNAL LETTERS, 721(1), L19–L23.
Vancouver
1.
Valentinuzzi T, Poggianti B, Saglia R, Aragon-Salamanca A, Simard L, Sanchez-Blazquez P, et al. Superdense massive galaxies in the eso distant cluster survey (EDisCS). ASTROPHYSICAL JOURNAL LETTERS. 2010;721(1):L19–L23.
MLA
Valentinuzzi, T, BM Poggianti, RP Saglia, et al. “Superdense Massive Galaxies in the Eso Distant Cluster Survey (EDisCS).” ASTROPHYSICAL JOURNAL LETTERS 721.1 (2010): L19–L23. Print.
@article{1244293,
  abstract     = {We find a significant number of massive and compact galaxies in clusters from the ESO Distant Clusters Survey (EDisCS) at 0.4 < z < 1. They have similar stellar masses, ages, sizes, and axial ratios to local z similar to 0.04 compact galaxies in WIde field Nearby Galaxy clusters Survey (WINGS) clusters, and to z = 1.4-2 massive and passive galaxies found in the general field. If non-brightest cluster galaxies of all densities, morphologies, and spectral types are considered, the median size of EDisCS galaxies is only a factor 1.18 smaller than in WINGS. We show that for morphologically selected samples, the morphological evolution taking place in a significant fraction of galaxies during the last Gyr may introduce an apparent, spurious evolution of size with redshift, which is actually due to intrinsic differences in the selected samples. We conclude that the median mass-size relation of cluster galaxies does not evolve significantly from z similar to 0.7 to z similar to 0.04. In contrast, the masses and sizes of BCGs and galaxies with M-* > 4 x 10(11) M-circle dot have significantly increased by a factor of 2 and 4, respectively, confirming the results of a number of recent works on the subject. Our findings show that progenitor bias effects play an important role in the size-growth paradigm of massive and passive galaxies.},
  author       = {Valentinuzzi, T and Poggianti, BM and Saglia, RP and Aragon-Salamanca, A and Simard, L and Sanchez-Blazquez, P and D'onofrio, M and Cava, A and Couch, WJ and Fritz, Jacopo and Moretti, A and Vulcani, B},
  issn         = {2041-8205},
  journal      = {ASTROPHYSICAL JOURNAL LETTERS},
  keywords     = {HIGH-REDSHIFT GALAXIES,VELOCITY DISPERSIONS,STAR-FORMATION HISTORIES,MORPHOLOGY-DENSITY RELATION,ELLIPTIC GALAXIES,SIZE EVOLUTION,SPECTROSCOPY,WINGS,DEPENDENCE,Z-SIMILAR-TO-1,galaxies: clusters: general,galaxies: evolution,galaxies: formation,galaxies: structure},
  language     = {eng},
  number       = {1},
  pages        = {L19--L23},
  title        = {Superdense massive galaxies in the eso distant cluster survey (EDisCS)},
  url          = {http://dx.doi.org/10.1088/2041-8205/721/1/L19},
  volume       = {721},
  year         = {2010},
}

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