Department of Physics and Astronomy: Publications and Other Research
Document Type
Article
Date of this Version
1976
Abstract
Implications of observed upper limits to the neutral hydrogen content of E and SO galaxies from Paper I are discussed. If gas shed by dying stars is completely retained by these galaxies and exists as H I, these upper limits will be exceeded in only 109 yr for E's and SO's and in only 2 x 108 yr for NGC 4472. Evidently, gas either is hidden in some undetectable form or is removed from the interstellar medium completely.
Comments
Published in The Astrophysical Journal 204. Copyright (c) 1976 The American Astronomical Society. Used by permission.