A Shared Tully-Fisher Relation for Spiral and S0 Galaxies

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We measure the Tully-Fisher relations of 14 lenticular galaxies (S0s) and 14 spirals. We use two measures of rotational velocity. One is derived directly from observed spatially-resolved stellar kinematics and the other from the circular velocities of mass models that include a dark halo and whose parameters are constrained by detailed kinematic modelling. Contrary to the naive expectations of theories of S0 formation, we find no significant difference between the Tully-Fisher relations of the two samples when plotted as functions of both brightness and stellar mass.
To appear in Galaxy Evolution: Emerging Insights and Future Challenges, ed. S. Jogee et al., Astron. Soc. Pacific, 2009; v2 fixes minor typos

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Astrophysics of Galaxies

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http://salesiana.dossiersoluciones.com/handle/123456789/224532

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0902.1500
 http://arxiv.org/abs/0902.1500

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arXiv