@inproceedings{af24bba32cf143aba0abefce723ccc16,
title = "A dark galaxy in the virgo cluster imaged at 21-cm",
abstract = "Dark Matter supposedly dominates the extragalactic Universe (Peebles 1993; Peacock 1998; Moore et al. 1999; D{\textquoteright}Onghi & Lake 2004), yet no dark structure of galactic proportions has ever been convincingly identified. Earlier (Minchin et al. 2005) we suggested that VIRGOHI 21, a 21-cm source we found in the Virgo Cluster at Jodrell Bank using single-dish observations (Davies et al. 2004), was probably such a dark galaxy because of its broad line-width (∼200 km s−1) unaccompanied by any visible gravitational source to account for it. We have now imaged VIRGOHI 21 in the neutral-hydrogen line, and have found what appears to be a dark, edge-on, spinning disc with the mass and diameter of a typical spiral galaxy. Moreover the disc has unquestionably interacted with NGC 4254, a luminous spiral with an odd one-armed morphology, but lacking the massive interactor normally linked with such a feature. Published numerical models (Vollmer et al. 2005) of NGC 4254 call for a close interaction ∼108 years ago with a perturber of ∼1011 solar masses. This we take as further, independent evidence for the massive nature of VIRGOHI 21.",
keywords = "Dark matter, Galaxies: Intergalactic medium, Galaxies: Peculiar",
author = "Minchin, {R. F.} and Disney, {M. J.} and Davies, {J. I.} and Marble, {A. R.} and Impey, {C. D.} and Boyce, {P. J.} and Garcia, {D. A.} and M. Grossi and Jordan, {C. A.} and Lang, {R. H.} and S. Roberts and S. Sabatini and {Van Driel}, W.",
note = "Funding Information: Acknowledgements We thank the NFRA for use of the WSRT and PPARC for financial support. We would like to thank the following for useful comments: Virginia Kilborn, Erwin de Blok, Martin Zwaan and Greg Bothun. Arecibo Observatory is part of NAIC, which is operated by Cornell University under a cooperative agreement with the NSF. Publisher Copyright: {\textcopyright} 2007, Springer Netherlands. All rights reserved.; International Conference on Island Universe: Structure and Evolution of Disk Galaxies, 2005 ; Conference date: 03-07-2005 Through 05-07-2005",
year = "2007",
doi = "10.1007/978-1-4020-5573-7_15",
language = "English (US)",
isbn = "9780387727677",
series = "Astrophysics and Space Science Proceedings",
publisher = "Springer Science and Business Media B.V.",
pages = "101--106",
editor = "{De Jong}, R.S.",
booktitle = "Astrophysics and Space Science Proceedings",
}