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Test of Clausius' Virial Dynamical Theory of Fundamental Plane By Homogeneous + γ-Free Two Component Galaxy Model

Published online by Cambridge University Press:  01 August 2006

D. Bindoni ,
L. Secco ,
R. Caimmi ,
M. D'Onofrio  and
T. Valentinuzzi
D. Bindoni
Affiliation:
Department of Astronomy, University of Padova, Padova, ITALY†
L. Secco
Affiliation:
Department of Astronomy, University of Padova, Padova, ITALY†
R. Caimmi
Affiliation:
Department of Astronomy, University of Padova, Padova, ITALY†
M. D'Onofrio
Affiliation:
Department of Astronomy, University of Padova, Padova, ITALY†
T. Valentinuzzi
Affiliation:
Department of Astronomy, University of Padova, Padova, ITALY†
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Abstract

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To test the extension of the theory of the Fundamental Plane (FP) proposed by Secco (2000, 2001, 2005) to an higher order (non-linear) we explore the effect on an homogeneous stellar component due to a DM halo with a density profile characterized by an inner slope γ free and an outer slope −3, according to high resolution RCs of Sps (Garrido et al., 2004). The aim is to investigate the role of the dark to bright mass ratio m and of the halo concentration CD in order to produce the maximum of Clausius' Virial potential energy (CV). Particular attention is devoted to the slope of the density halo profile at the maximum location, to its height in comparison with the CV value when the two components coincide, Vn. For all models we choose γ = 0. We follow the general method proposed by Caimmi, 1993 for two striated ellipsoidals with Zhao-density profiles. Virial equilibrium is described by tensor virial equations extended to two components (Caimmi & Secco, 1992). Sequences of CV as function of the ratio baryonic to halo virial semi-axis, numerically performed for different values of m and CD, are taken into account.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S235: Galaxy Evolution Across the Hubble Time , August 2006 , pp. 79
Copyright
Copyright © International Astronomical Union 2007

References

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