Bibcode
Graham, Alister W.; Erwin, P.; Trujillo, I.; Asensio Ramos, A.
Referencia bibliográfica
"Coevolution of Black Holes and Galaxies, from the Carnegie Observatories Centennial Symposia. Carnegie Observatories Astrophysics Series. Edited by L. C. Ho, 2004. Pasadena: Carnegie Observatories, http://www.ociw.edu/ociw/symposia/series/symposium1/proceedings.html&qu…;
Advertised on:
2004
Número de citas
5
Número de citas referidas
4
Descripción
The Nuker model, when applied to the inner regions of ``core'' galaxies,
is shown to produce systematic biases in the determination of the core
``break-radii''. These radii can easily be (and often have been, see
Trujillo et al. 2003) over-estimated by more than 100%. Moreover, due
to curvature in the outer profiles of early-type galaxies (i.e., beyond
the break-radius), none of the Nuker model parameters are found to be
robust quantities. A new empirical model that simultaneously describes
both the inner and outer light-profiles of elliptical galaxies (and
bulges in general) is presented. It consists of a Sérsic
function with an inner power-law and a variable transition region.