The extragalactic H I cloud in Leo

Details The extragalactic H I cloud in Leo The extragalactic H I cloud in Leo

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90..450p&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, March 1985, p. 450-453.

Astronomy and Astrophysics

Astronomy

9

Astronomical Photometry, Dwarf Galaxies, Elliptical Galaxies, Hydrogen Clouds, Infrared Spectra, Intergalactic Media, Brightness Distribution, Charge Coupled Devices, Emission Spectra, Far Infrared Radiation, Galactic Evolution, Hubble Diagram

Scientific paper

Wide-field CCD images are used to provide a surface-brightness limit to the B passband flux of mu-B = 30.2 mag/arcsec-squared for the extragalactic H I cloud in Leo. Corresponding upper limits of M(H I) LB greater than 10 solar mass/solar luminosity and M(virial)/LB greater than 700 solar mass/solar luminosity are obtained. These limits are discussed in terms of the two general hypotheses: is the cloud a stable or transient configuration? It seems unlikely that such an extended cloud could endure for a Hubble time in the tidal field associated with the group. IRAS observations may provide critical data concerning the origin of the cloud.

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