The Problem of Stellar Anisotropies in Nearby Galaxies

Details The Problem of Stellar Anisotropies in Nearby Galaxies The Problem of Stellar Anisotropies in Nearby Galaxies

Sep 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010pobeo..90...77s&link_type=abstract

Publications of the Astronomical Observatory of Belgrade, vol. 90, pp. 77-80

Astronomy and Astrophysics

Astronomy

Scientific paper

In this contribution I discuss the problem of stellar anisotropies in galaxies in the nearby Universe and its importance for solving some issues pertaining to galactic dynamics. First, I present a necessary theoretical background using long-slit spectra of nearby early-type galaxies. Then using these spectra I show how anisotropies might affect the estimates of the total mass of a given galaxy. I also discuss the sample of nearby galaxies (consisted of both early- and late-type galaxies) extracted from the Sloan Digital Sky Survey. This is largest sample of galaxies obtained to date which contains full kinematic profile of the objects (velocity, velocity dispersion and Gauss-Hermite h_3 and h_4 anisotropy parameters). Finally, I discuss the influence of anisotropies in the stellar motions on the determination of the Lick indices.

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