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Dust in Cluster Dwarf Elliptical Galaxies

De Looze, I., Baes, M., Fritz, J., Verstappen, J., Bendo, G. J., Bianchi, S., Bomans, D. J., Boselli, A., Clemens, M., Corbelli, E., Cortese, L., Dariush, A., Davies, J. I., di Serego Alighieri, S., Fadda, D., Garcia-Appadoo, D. A., Gavazzi, G., Giovanardi, C., Grossi, M., Hughes, T. M., Hunt, L. K., Jones, A. P., Madden, S., Magrini, L., Pierini, D., Pohlen, M., Sabatini, S., Smith, Matthew, Vlahakis, C., Xilouris, E. M. and Zibetti, S. 2012. Dust in Cluster Dwarf Elliptical Galaxies. Presented at: Joint European and National Astronomy Meeting 2010, Lisbon, Portugal, 6-10 September 2010. Published in: Papaderos, P, Recchi, S and Hensler, G eds. Dwarf Galaxies: Keys to Galaxy Formation and Evolution. Astrophysics and Space Science Proceedings Berlin: Springer, pp. 163-167. 10.1007/978-3-642-22018-0_18

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Abstract

Based on single cross-scan data of the Herschel Virgo Cluster Survey, we report the first detections of dust in cluster early-type dwarf galaxies: VCC 209, VCC 781 and VCC 951. All three galaxies have dust masses Md ≈ 105 − 106 M⊙ and average dust temperatures ≈ 16–20 K. Since these three early-type dwarfs reside in densely crowded regions close to the center of the Virgo cluster, and several Hi-detected dwarfs in the outskirts of Virgo were not detected by Herschel(implying a dust content < 104 M⊙), this might imply that dust in dwarfs is more closely related to the molecular gas, which is more centrally peaked in a galaxy’s potential well and therefore, not easily removed by any stripping mechanism. We conclude that the removal of interstellar dust from these early-type dwarfs appears to be less efficient than the removal of the Hi gas.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Springer
ISBN: 9783642220173
ISSN: 1570-6591
Last Modified: 08 Dec 2017 15:03
URI: http://orca.cf.ac.uk/id/eprint/107383

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