Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..596p&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 15, 1988, p. 596-615.
Astronomy and Astrophysics
Astrophysics
23
Astronomical Photometry, Elliptical Galaxies, Equipotentials, Galactic Structure, Astronomical Models, Charge Coupled Devices, Intergalactic Media, Luminosity, Mass To Light Ratios
Scientific paper
A study of the shell galaxy NGC 3923 based on a large set of CCD and photographic observations is presented. The geometry of 22 shells is investigated in detail, with an estimate of the uncertainties. The interleaving of shells is well-defined for the outer shells, but the distances of the inner shells present a certain symmetry relative to the center. The shells have a roughly constant ellipticity of 1 + or - 0.4, and the inner shells have a thickness of typically 0.17 kpc. The total B luminosity of the shell system is about 5 percent of the galactic luminosity. The outer shells are much more luminous than the inner ones, contributing about 85 percent of the total luminosity. A photometric study of the galaxy is presented. The inferred central M/L ratio, roughly 10, does not depart from the values usually found in ellipticals.
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