On the Intrinsic Shape of Elliptical Galaxies

Details On the Intrinsic Shape of Elliptical Galaxies On the Intrinsic Shape of Elliptical Galaxies

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...275...61t&link_type=abstract

Astronomy and Astrophysics, Vol.275, NO. 1/AUG(I), P. 61, 1993

Astronomy and Astrophysics

Astrophysics

18

Scientific paper

We present a method to constrain the intrinsic axial ratios, viewing angles and intrinsic kinematic misalignment (the angle between the angular momentum and the shortest axis) of triaxial elliptical galaxies. The method is based on the hypothesis that the isodensity contours of a galaxy can be represented as similar triaxial ellipsoids, and assumes intrinsic stellar velocity fields similar to model III in Franx et al. (1991). The knowledge of the photometric and kinematic properties of the stellar component and the gas morphology is required. The structure of three elliptical galaxies, NGC 5989 (E0), NGC 1947 (E1), and NGC 1052 (E3), is analysed and permitted regions for intrinsic axial ratios and viewing angles are obtained. It is found that in two of the cases the kinematical misalignment is small or absent.

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