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Searching for Dark Galaxies: The AGES VC2 Region

Published online by Cambridge University Press:  01 June 2007

R. Taylor ,
R. Auld ,
L. Cortese ,
J. Davies  and
R. Minchin
R. Taylor
Affiliation:
Department of Physics and Astronomy, Cardiff University, U.K. email : [email protected]
R. Auld
Affiliation:
Department of Physics and Astronomy, Cardiff University, U.K. email : [email protected]
L. Cortese
Affiliation:
Department of Physics and Astronomy, Cardiff University, U.K. email : [email protected]
J. Davies
Affiliation:
Department of Physics and Astronomy, Cardiff University, U.K. email : [email protected]
R. Minchin
Affiliation:
Department of Physics and Astronomy, Cardiff University, U.K. email : [email protected]
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Abstract

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The VC2 strip (part of the AGES blind HI survey) spans 5x1 degrees of the Virgo Cluster, from the outskirts of the cluster to its interior. The strip covers part of subcluster A while avoiding the strong continuum source M87. 40 hours of observations were taken in January-February 2007 using the ALFA instrument on the Arecibo telescope, reaching a noise level as low as 0.5 mJy. For a 200 km/s velocity width, this gives a sensitivity limit of 6*106 Msolar at the Virgo distance (16 Mpc). Currently, 36 definite sources have been found, both by eye and with the automatic extractor Polyfind, with an additional 12 requiring follow-up observations, found only by one method.

Keywords

Dark galaxiesVirgohigh velocity clouds
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 389 - 390
Copyright
Copyright © International Astronomical Union 2008