The contribution of rotational velocity to the FP of elliptical galaxies

Abstract

The contribution of ordered rotation to the observed tilt and thickness of the Fundamental Plane of elliptical galaxies is studied by means of oblate, two-integrals cuspy galaxy models with adjustable flattening, variable amount of ordered rotational support, and possible presence of a dark matter halo and of a central super-massive black hole. We find that, when restricting the measure of the velocity dispersion to the central galactic regions, rotation has a negligible effect, and so cannot be responsible of the observed tilt. However, streaming velocity effect can be significant when observing small and rotationally supported galaxies through large (relative) aperture (as for example in Fundamental Plane studies at high redshift), and can lead to unrealistically low mass-to-light ratios. The effect of a central supermassive black hole on the kinematical fields, and the models position in the v/sigma-ellipticity plane are also discussed.

arXiv comment10 pages, 4 figures, accepted by A&A

References in corpus (20)

• A Universal Density Profile from Hierarchical Clustering
• A Fundamental Relation Between Supermassive Black Holes and Their Host Galaxies
• The Demography of Massive Dark Objects in Galaxy Centres
• A Relationship Between Nuclear Black Hole Mass and Galaxy Velocity Dispersion
• The SAURON project. II. Sample and early results
• The Fundamental Plane for cluster E and S0 galaxies
• The SAURON project - III. Integral-field absorption-line kinematics of 48 elliptical and lenticular galaxies
• A Family of Models for Spherical Stellar Systems
• Spatially resolved spectroscopy of Coma cluster early -- type galaxies: III. The stellar population gradients
• Keck Spectroscopy of distant GOODS Spheroidal Galaxies: Downsizing in a Hierarchical Universe
• The Tilt of the Fundamental Plane of Elliptical Galaxies: I. Dynamical and Structural Effects
• Weak homology of elliptical galaxies
• Near-Infrared Imaging of Early-Type Galaxies IV. The Physical Origins of the Fundamental Plane Scaling Relations
• Extended stellar kinematics of elliptical galaxies in the Fornax cluster
• Axisymmetric galaxy models wth central BHs, with an application to M32
• The tilt of the Fundamental Plane of Early-type galaxies: wavelength dependence
• The energetics of flat and rotating early-type galaxies and their X-ray luminosity
• A simple method to construct exact density-potential pairs from a homeoidal expansion
• Projection effects on the FP thickness: a Monte-Carlo exploration
• Tomography of Collisionless Stellar Systems

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