Other
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95..422e&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 95, Feb. 1988, p. 422-437. Research supported by Harvard University.
Other
83
Astronomical Photometry, Cosmic Dust, Elliptical Galaxies, Galactic Evolution, Galactic Structure, Star Formation, Charge Coupled Devices, Density Distribution, Image Processing, Signal To Noise Ratios
Scientific paper
Using data from the CCD surface-photometry survey of Djorgovski (1985), images of 159 galaxies were examined for the presence of dust lanes, incipient stellar disks, bars, shells, and other features that signify deviations from elliptical symmetry. The sample contained 116 elliptical galaxies, 33 SO galaxies and 10 intermediate galaxies. It was found that forty-two of the ellipticals either definitely or very likely contain dust, either in patches or in well-defined lanes or rings. Five of the E/SO galaxies also show possible or definite dust, as do 15 of the SOs. Three of the elliptical galaxies definitely contain stellar disks, with several more possible candidates. The presence of these features in almost half of the elliptical galaxies studied demonstrates that elliptical galaxies are not the featureless objects they were once thought to be. Moreover, the finding of weak stellar disks in some of them further blurs the distinction between ellipticals and SOs.
Davis Martin
Djorgovski Stanislav
Ebneter Kate
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