Central brightness profiles and isophotal shapes in elliptical galaxies

Details Central brightness profiles and isophotal shapes in elliptical galaxies Central brightness profiles and isophotal shapes in elliptical galaxies

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...244l..37n&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 244, no. 2, April 1991, p. L37-L40. NATO-supported research.

Physics

Optics

60

Astronomical Photometry, Elliptical Galaxies, Galactic Evolution, Galactic Structure, Stellar Luminosity, Cassegrain Optics, Charge Coupled Devices, Isophotes

Scientific paper

The central profiles of a large sample of 75 elliptical galaxies have been derived from high-resolution CCD imaging, and a study has been made of a possible correlation between central brightness profiles and isophotal shapes. It is found that all disk E's have peaked central profiles, unresolved by the observational material, while a fair proportion of boxy or irregular E's have flat, well-resolved central profiles. This result strengthens the physical similarities between disk E's and SO's, supports the assumption that isophotal shapes reflect evolutionary and structural differences among E's, and suggests that disk E's form with more dissipation than boxy or irregular E's.

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