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The σc — Vcirc correlation in high and low surface brightness galaxies

Published online by Cambridge University Press:  26 May 2016

A. Pizzella ,
E. Dalla Bontà ,
E. M. Corsini ,
L. Coccato  and
F. Bertola
A. Pizzella
Affiliation:
Dipartimento di Astronomia, Università di Padova, Padova, Italy
E. Dalla Bontà
Affiliation:
Dipartimento di Astronomia, Università di Padova, Padova, Italy
E. M. Corsini
Affiliation:
Dipartimento di Astronomia, Università di Padova, Padova, Italy
L. Coccato
Affiliation:
Dipartimento di Astronomia, Università di Padova, Padova, Italy
F. Bertola
Affiliation:
Dipartimento di Astronomia, Università di Padova, Padova, Italy

Abstract

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We investigate the relation between the central velocity dispersion, σc, and the circular velocity, Vcirc, in galaxies. in addition to previously obtained data, we consider an observationally homogeneus sample of 52 high surface brightness and 11 low surface brightness spiral galaxies. We performed a straight line regression analysis in a linear scale, finding a good fit, also for low σc galaxies, always rejected in the previous studies. Low surface brightness galaxies seem to behave differently, showing either higher values of Vcirc or lower values of σc with respect to their high surface brightness counterparts.

Type
Part 10: Low Surface Brightness Galaxies
Information
Symposium - International Astronomical Union , Volume 220: Dark Matter in Galaxies , 2004 , pp. 339 - 340
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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