Dust in cluster dwarf elliptical galaxies

I. De Looze, M. Baes, J. Fritz, J. Verstappen, G. J. Bendo, S. Bianchi, D. J. Bomans, A. Boselli, M. Clemens, E. Corbelli, L. Cortese, A. Dariush, J. I. Davies, S. Di Serego Alighieri, D. Fadda, D. A. Garcia-Appadoo, G. Gavazzi, C. Giovanardi, M. Grossi, T. M. HughesL. K. Hunt, A. P. Jones, S. Madden, L. Magrini, D. Pierini, M. Pohlen, S. Sabatini, M. W.L. Smith, C. Vlahakis, E. M. Xilouris, S. Zibetti

Research output: Chapter in Book/Conference paperConference paper

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: VCC209, VCC781 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.

Original languageEnglish
Title of host publicationDwarf Galaxies
Subtitle of host publicationKeys to Galaxy Formation and Evolution - Proceedings of Symposium 3 of JENAM 2010
PublisherSpringer (Kluwer Academic Publishers - Biomedical Engineering Society (BMES))
Pages163-167
Number of pages5
ISBN (Print)9783642220173
DOIs
Publication statusPublished - 2012
Event3rd JENAM Symposium - Dwarf Galaxies: Keys to Galaxy Formation and Evolution, JENAM 2010 - Lisbon, Portugal
Duration: 9 Sep 201010 Sep 2010

Publication series

NameAstrophysics and Space Science Proceedings
ISSN (Print)1570-6591
ISSN (Electronic)1570-6605

Conference

Conference3rd JENAM Symposium - Dwarf Galaxies: Keys to Galaxy Formation and Evolution, JENAM 2010
Country/TerritoryPortugal
CityLisbon
Period9/09/1010/09/10

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