NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-19 T09:23:41 PDT
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For refcode 1994A&A...282L...1P:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1994A&A...282L...1P Letter to the Editor Equilibrium and rotational support of elliptical galaxies Ph. Prugniel and F. Simien Observatoire de Haute-Provence, F-04870 St-Michel-l'Observatoire, France LEDA, Observatoire de Lyon, F-6956 1 St-Genis-Laval Cedex, France Received 14 October 1993/Accepted 23 November 1993 Abstract. In order to study the contribution of the rotation to the total kinetic energy of elliptical galaxies, we have obtained new rotation curves and velocity dispersion profiles for 34 galaxies selected for their large residuals with respect to the Fundamental Plane. For a sample of 113 galaxies from our new observations and the available literature, we have analyzed these residuals as a function of the rotational support, quantified by the V_max_/{sigma}0 parameter. The contribution of the rotation to the global equilibrium status of elliptical galaxies is detected and is found to be in agreement with a simple prediction based on the virial theorem for isotropic rotators. The addition of a rotation term to the Fundamental-Plane relation extends its validity to fast rotators, with even a marginal decrease in its apparent thickness. Key words: galaxies: elliptical & lenticular, cD; galaxies: fundamental parameters; galaxies: general; galaxies: kinematics & dynamics
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