Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/52644

Title

HI in local group analogs: what does it tell us about galaxy formation?

Author(s)

Pisano, Daniel J.;  Barnes, David G.;  Gibson, Brad K.;  Staveley-Smith, Lister;  Freeman, Kenneth C.;  Kilborn, V. A.

Abstract

We present the results of our HI survey of six loose groups of galaxies analogous to the Local Group. The survey was conducted using the Parkes telescope and the Australia Telescope Compact Array to produce a census of all the gas-rich galaxies and potential analogs to the high-velocity clouds (HVCs) within these groups down to MHI ≤ 107M⊙as a test of models of galaxy formation. We present the HI mass function and halo mass function for these analogous groups and compare them with the Local Group and other environments. We also demonstrate that our non-detection of HVC analogs in these groups implies that they must have low HI masses and be clustered tightly around galaxies, including around our own Milky Way, and are not distributed throughout the Local Group.

Publication type

Conference paper

Research centre

Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing

Source

ESO Astrophysics Symposia: 'Groups of Galaxies in the Nearby Universe': Proceedings of the ESO Workshop, Santiago de Chile, 05-09 December 2005 / Ivo Saviane, Jordanka Borissova (eds.), pp. 33-38

Publication year

2007

Keyword(s)

Gas rich galaxies;  High velocity clouds;  Local Goup

Publisher

Springer

ISSN

1431-2433 (series ISSN)

ISBN

9783540711728, 3540711724

Publisher URL

http://dx.doi.org/10.1007/978-3-540-71173-5_4

Copyright

Copyright © 2007 Springer.

Peer reviewed