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bibo:Article rdac:C10001

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n15:distributionandluminosityfunctionsofdwarfs

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On the Lack of Stellar Bars in Coma Dwarf Galaxies

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2011-01-01

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marcrel:aut

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dcterms:abstract

We present a study of the bar fraction in the Coma cluster galaxies based on a sample of ~190 galaxies selected from the SDSS-DR6 and observed with the Hubble Space Telescope (HST) Advanced Camera for Survey (ACS). We explore the presence of bars, detected by visual classification, throughout an unprecedented luminosity range of 9 mag (− 23 < M r< −14). We find that bars are hosted by galaxies in a tight range of both luminosities (−22 < M r< −17) and masses (10 9< M ∗/ M⊙< 10 11). We find also that the bar fraction does not vary significantly with the distance to the cluster center, implying that cluster environment plays a second-order role in bar formation/evolution. The shape of the bar fraction distribution with respect to both luminosity and mass is well matched by the luminosity distribution of disk galaxies in Coma, indicating that bars are good tracers of cold stellar disks.

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eas1148070

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2011-01-01

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© EAS, EDP Sciences, 2011

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EAS, EDP Sciences

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