Photometry of groups of galaxies. 2: The NGC 972 group

Details Photometry of groups of galaxies. 2: The NGC 972 group Photometry of groups of galaxies. 2: The NGC 972 group

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994an....315..245v&link_type=abstract

Astronomische Nachrichten (ISSN 0004-6337), vol. 315, no. 3, p. 245-251

Other

9

Astronomical Photometry, Dwarf Galaxies, Galactic Clusters, Galactic Evolution, Spiral Galaxies, Brightness Distribution, Color-Magnitude Diagram, Mass To Light Ratios, Star Formation, Stellar Models

Scientific paper

A nearby group of galaxies, centered at the spiral galaxy NGC 972 and conspicuously rich in faint dwarf spheroidal galaxies, has been investigated photometrically on the B and V plates, obtained with the Tautenburg 2m Schmidt telescope. For ten certain and probable group members the equivalent B and V brightness profiles have been extracted. Integrated magnitudes and mean colors of faint group members have been estimated. Typically, the dwarfs show a sub-exponential (i.e. a convex curvature over the linear radius) surface brightness profile and often a central excess. Their equivalent profiles are reasonably well fitted by modified isothermal (King) models.

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