HI gas disks in elliptical galaxies

Details HI gas disks in elliptical galaxies HI gas disks in elliptical galaxies

2000-11-22

arxiv.org/abs/astro-ph/0011399v1

Astronomy and Astrophysics

Astrophysics

to appear in "Galaxy disks & disk galaxies", ASP Conference Series, J.G. Funes & E.M. Corsini (eds.)

Scientific paper

We discuss a class of low-luminosity E/S0 galaxies which have both HI disks and (in contrast to more luminous E/S0s with HI) ongoing star formation. We suggest that such objects are common, but that only a few are known at present because optical magnitude-limited galaxy catalogues are biased against them. The HI Parkes All-Sky Survey (HIPASS) should eventually detect many more. We suggest that `boxy' and `disky' ellipticals are distinct not only in their structure and kinematics, but in their star-formation history.

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