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SEMINARIO
IAC
El Instituto Avanzado de Cosmología
IAC, se complace en invitar a nuestra comunidad de gravitacion,
astrofísica y cosmología, a su proximo seminario:
"Scalar-Tensor Galaxy Models ."
Dr.
Jorge Cervantes Cota
Departamento de Física
Instituto Nacional de Investigaciones Nucleares (ININ)
Abstract
We build a spherical halo model for galaxies using a general
scalar-tensor theory of gravity in its Newtonian limit. The
scalar field is described by a time-independent Klein-Gordon equation
with
a source which is coupled to the standard Poisson equation of
Newtonian
gravity. Our model, by construction, fits both the observed rotation
velocities of stars in spirals and a typical luminosity profile.
As
a result, the form of the new Newtonian potential, the scalar
field,
and DM distribution in a galaxy are determined. Taking into account
the
constraints for the fundamental parameters of the theory
$(\lambda, \,\alpha)$, we analyse the influence of the scalar
field in the DM distribution, resulting in shallow density
profiles in galactic centres.
.
El evento se llevará a cabo
el dia:
Martes 9
de Septiembre 1 p.m.
en la
Sala Sandoval Vallarta del Instituto de Física, U.N.A.M.
Vea el Cartel Correspondiente
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