We use the Science Demonstration Phase data of the Herschel Virgo Cluster Survey to search for dust emission of early-type dwarf galaxies in the central regions of the Virgo Cluster as an alternative way of identifying the interstellar medium.We present the first possible far-infrared detection of cluster early-type dwarf galaxies: VCC781 and VCC951 are detected at the 10 sigma level in the SPIRE 250 micron image. Both detected galaxies have dust masses of the order of 10^5 Msun and average dust temperatures ~20K. The detection rate (less than 1%) is quite high compared to the 1.7% detection rate for Hi emission, considering that dwarfs in the central regions are more Hi deficient. We conclude that the removal of interstellar dust from dwarf galaxies resulting from ram pressure stripping, harassment, or tidal effects must be as efficient as the removal of interstellar gas.
@article{arxiv.1005.3060,
title = {The Herschel Virgo Cluster Survey: VII. Dust in cluster dwarf elliptical galaxies},
author = {I. De Looze and M. Baes and S. Zibetti and J. Fritz and L. Cortese and J. I. Davies and J. Verstappen and G. J. Bendo and S. Bianchi and M. Clemens and D. J. Bomans and A. Boselli and E. Corbelli and A. Dariush and S. di Serego Alighieri and D. Fadda and D. A. Garcia-Appadoo and G. Gavazzi and C. Giovanardi and M. Grossi and T. M. Hughes and L. K. Hunt and A. P. Jones and S. Madden and D. Pierini and M. Pohlen and S. Sabatini and M. W. L. Smith and C. Vlahakis and E. M. Xilouris},
journal= {arXiv preprint arXiv:1005.3060},
year = {2016}
}
Comments
Letter accepted for publication in A&A (Herschel special issue)