Relating basic properties of bright early-type dwarf galaxies to their location in Abell 901/902
| Autor: | F. D. Barazza, C. Wolf, M. E. Gray, S. Jogee, M. Balogh, D. H. McIntosh, D. Bacon, M. Barden, E. F. Bell, A. Böhm, J. A. R. Caldwell, B. Häussler, A. Heiderman, C. Heymans, K. Jahnke, E. van Kampen, K. Lane, I. Marinova, K. Meisenheimer, C. Y. Peng, S. F. Sanchez, A. Taylor, L. Wisotzki, X. Zheng |
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| Rok vydání: | 2009 |
| Předmět: |
Digital Sky Survey
Stellar Populations Cosmology and Gravitation Cosmology and Nongalactic Astrophysics (astro-ph.CO) Star-Formation Histories Population Color-Magnitude Relation FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Elliptic Galaxies 01 natural sciences Luminosity Spheroidal Galaxies 0103 physical sciences galaxies: formation Astrophysics::Solar and Stellar Astrophysics Space-Telescope Surface brightness education 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Dwarf galaxy Physics education.field_of_study Spiral Galaxies 010308 nuclear & particles physics Coma Cluster Astronomy and Astrophysics galaxies: dwarf Galaxy Ram pressure Space and Planetary Science galaxies: clusters: individual: Abell 901/902 Magnitude (astronomy) Virgo-Cluster Survey Elliptical galaxy galaxies: structure Astrophysics::Earth and Planetary Astrophysics galaxies: evolution Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Barazza, F D, Wolf, C, Gray, M E, Jogee, S, Balogh, M L, Mcintosh, D H, Bacon, D, Barden, M, Bell, E F, Bohm, A, Caldwell, J A R, Haussler, B, Heiderman, A, Heymans, C, Jahnke, K, Van Kampen, E, Lane, K, Marinova, I, Meisenheimer, K, Peng, C Y, Sanchez, S F, Taylor, A, Wisotzki, L & Zheng, X 2009, ' Relating basic properties of bright early-type dwarf galaxies to their location in Abell 901/902 ', Astronomy and Astrophysics, vol. 508, no. 2, pp. 665-675 . https://doi.org/10.1051/0004-6361/200912716 |
| ISSN: | 1432-0746 0004-6361 |
| DOI: | 10.1051/0004-6361/200912716 |
| Popis: | We present a study of the population of bright early-type dwarf galaxies in the multiple-cluster system Abell 901/902. We use data from the STAGES survey and COMBO-17 to investigate the relation between the color and structural properties of the dwarfs and their location in the cluster. The definition of the dwarf sample is based on the central surface brightness and includes galaxies in the luminosity range -16 >= M_B >~-19 mag. Using a fit to the color magnitude relation of the dwarfs, our sample is divided into a red and blue subsample. We find a color-density relation in the projected radial distribution of the dwarf sample: at the same luminosity dwarfs with redder colors are located closer to the cluster centers than their bluer counterparts. Furthermore, the redder dwarfs are on average more compact and rounder than the bluer dwarfs. These findings are consistent with theoretical expectations assuming that bright early-type dwarfs are the remnants of transformed late-type disk galaxies involving processes such as ram pressure stripping and galaxy harassment. This indicates that a considerable fraction of dwarf elliptical galaxies in clusters are the results of transformation processes related to interactions with their host cluster. 12 pages, 8 figures, accepted for publication in A&A, typo corrected in abstract |
| Databáze: | OpenAIRE |
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