Melville Ulmer
Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris
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| « Low Surface Brightness Galaxies in the Coma Cluster » |
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Melville Ulmer |
| Based on CFHT12k deep exposures that covered the central 4-6 core radii of the Coma cluster, we have found over 700 low surface brightness galaxies (LSBs). For the first time we have enough statistics to identify 3 distinct populations: one that lies upon an extension of the bright galaxy color magnitude relation; one that is blue, and another that is red. These data give important clues as to how LSBs are formed and their relationship to theories of how cold dark matter hierarchical formation of galaxies takes place. We discuss our interpretation of the results of our analysis and argue that the 3 populations have 3 distinct origins. |
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vendredi 24 juin 2005 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |