HI Tidal Tails, Bridges and Clouds

Details HI Tidal Tails, Bridges and Clouds HI Tidal Tails, Bridges and Clouds

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..217...34k&link_type=abstract

International Astronomical Union Symposium no. 217, held 14-17 July, 2003 in Sydney, Australia. Edited by P.-A. Duc, J. Braine

Astronomy and Astrophysics

Astronomy

2

Scientific paper

There is plenty of intergalactic H I gas without any obvious stellar content ranging from (1) extended gas envelopes around some normal and peculiar galaxies, (2) tidal tails/bridges in interacting or merging galaxy systems, (3) large-scale rings around early type galaxies, and (4) detached clouds at varying distances from associated galaxies, but there are few or no isolated H I clouds.
The HIPASS Bright Galaxy Catalog, which covers the whole southern sky, contains only one definite extragalactic H I cloud which is located close to the galaxy NGC 2442 whereas it is sensitive to isolated H I clouds with MHI > 106 × D2 M&sun;. The space density of H I clouds is therefore about 1/1000th that of galaxies with the same MHI.

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