The HI that Barked in the Night

Details The HI that Barked in the Night The HI that Barked in the Night

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008iaus..244....1d&link_type=abstract

Dark Galaxies and Lost Baryons, Proceedings of the International Astronomical Union, IAU Symposium, Volume 244, p. 1-6

Astronomy and Astrophysics

Astronomy

2

Galaxies: Formation, Cosmology: Dark Matter

Scientific paper

I discuss some of the interesting discoveries gradually emerging from the HIPASS HI survey. Why were so very few dark clouds and dark galaxies identified? Could that be partly due to optical misidentifications? In some cases yes. Will Arecibo overcome some of the deficiencies of HIPASS? I argue not because large telescopes are ill suited to blind surveys. I discuss the problem of Inchoate Galaxies which can be neither young nor old, and the constancy of HI column density found amongst all sources turning up in blind HI surveys. Could some of these unexpected phenomena be the result of Spin Temperature Freezeout? If so there is a lot more HI out there than we imagined.

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