Potential-density pairs for spherical galaxies and bulges in scalar-tensor theories of gravity

Details Potential-density pairs for spherical galaxies and bulges in scalar-tensor theories of gravity Potential-density pairs for spherical galaxies and bulges in scalar-tensor theories of gravity

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..17...43r&link_type=abstract

Galaxy Evolution: Theory & Observations (Eds. Vladimir Avila-Reese, Claudio Firmani, Carlos S. Frenk & Christine Allen) Revista

Astronomy and Astrophysics

Astronomy

Galaxy: Halo, Galaxy: Kinematics And Dynamics, Stellar Dynamics

Scientific paper

A family of potential-density pairs has been found for spherical halos and bulges of galaxies within the Newtonian limit of scalar-tensor theories of gravity. The scalar field is described by a modified Helmholtz equation with a source that is coupled to the standard Poisson equation of Newtonian gravity. Then, the net gravitational force is given by two contributions: the standard Newtonian potential plus a term stemming from massive scalar fields. General solutions have been found for spherical systems. Hence, we compute potential-density pairs of spherical, galactic systems, and their associated circular velocities

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