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Proceedings Paper

Ellipticity and Twisting Of The Isophotes Of Some Bright Galaxies In Virgo
Author(s): Roberto Barbon; Leopoldo Benacchio; Massimo Capaccioli; Giuseppe De Biase; Paolo Santin; Giorgio Sedmak
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Paper Abstract

Ellipticity and twisting of the isophotes of four lenticular and seven elliptical galaxies in the Virgo cluster are presented as a sample of a more complete photometric investigation. This work has been motivated by the increasing importance of this kind of information for the understanding of the spatial structure of E galaxies. The calibrated plate material from the Loiano 1.52 meter and Tautenburg Schmidt telescopes has been digitized with a PDS microdensitometer and analysed by means of the Interactive Numerical Mapping Package (IMP). Ellipticity and orientation profiles are presented in a graphical form together with a preliminary discussion. A correlation has been found between ellipticity and twisting in barred lenticulars which might help in the understanding of some E galaxies such as NGC 4406 and NGC 4374. Twisting has been detected in all of the seven ellipticals of the sample.

Paper Details

Date Published: 21 November 1980
PDF: 7 pages
Proc. SPIE 0264, Applications of Digital Image Processing to Astronomy, (21 November 1980); doi: 10.1117/12.959812
Show Author Affiliations
Roberto Barbon, University of Padova (Italy)
Leopoldo Benacchio, University of Padova (Italy)
Massimo Capaccioli, University of Padova (Italy)
Giuseppe De Biase, University of Roma (Italy)
Paolo Santin, Astronomical Observatory (Italy)
Giorgio Sedmak, Astronomical Observatory (Italy)

Published in SPIE Proceedings Vol. 0264:
Applications of Digital Image Processing to Astronomy
Denis A. Elliot, Editor(s)

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