Resumen

AVILA-CASTRO, F  y  SAUCEDO-MORALES, J. Using the MAST virtual observatory to study light profiles in elliptical galaxies. Rev. mex. fis. [online]. 2008, vol.54, suppl.2, pp.107-110. ISSN 0035-001X.

In this paper we use high quality images from the M.A.S.T. Virtual Observatory to elliptical galaxies with redshift z < 0.02 to explore the differences between the classic de Vaucouleurs r^1/4 and Sérsic r^1/n surface light profiles. With the data obtained from the light profiles fits for a sample of 20 elliptical galaxies, we study the fundamental plane of elliptical galaxies. The Fundamental Plane involves several physical quantities of the galaxy such as luminosity, dispersion velocity and effective radius. While it is known that the Sersic profile gives a better physical description of an individual galaxy, it was surprising that this data does not fit the Fundamental Plane for a sample of galaxies as well as the classical de Vaucouleurs fit does.

Palabras llave : Virtual observatory; elliptical galaxies; surface light profile; fundamental plane.

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