H I studies of the sculptor group galaxies

Details H I studies of the sculptor group galaxies H I studies of the sculptor group galaxies

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3098..129c&link_type=abstract

In NASA, Marshall Space Flight Center, Paired and Interacting Galaxies: International Astronomical Union Colloquium No. 124 p 12

Physics

Density (Mass/Volume), Galaxies, H I Regions, Kinematics, Luminosity, Mass To Light Ratios, Matter (Physics), Halos, Solar Radiation, Very Large Array (Vla)

Scientific paper

Results from large-scale mapping of the H I gas in the Sculptor group are presented. From this kinematic analysis, a mean global (M/LB) approx. equals 9 solar maximum/solar luminosity (at the last observed velocity point) is found for the individual galaxies. This is only a factor approx. 10 smaller than the (M/LB) dyn approx. equals 90 solar maximum/solar luminosity derived from a dynamical study of the whole group. The parameters derived from the mass models suggest that most of the unseen matter has to be concentrated around the luminous galaxies. Under the assumption that the Sculptor group is a virialized system and that all the mass is associated with the galaxies, an upper limit of approx. 40 kpc is derived for the size of the dark halos present in the five late-type spirals of the group.

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