THE MULTI-GAUSSIAN EXPANSION METHOD - A TOOL FOR BUILDING REALISTIC PHOTOMETRIC AND KINEMATICAL MODELS OF STELLAR-SYSTEMS .2. APPLICATION TO THE CENTRAL REGION OF THE SOMBRERO GALAXY (NGC-4594)

Authors
EMSELLEM E MONNET G BACON R NIETO JL
Citation
E. Emsellem et al., THE MULTI-GAUSSIAN EXPANSION METHOD - A TOOL FOR BUILDING REALISTIC PHOTOMETRIC AND KINEMATICAL MODELS OF STELLAR-SYSTEMS .2. APPLICATION TO THE CENTRAL REGION OF THE SOMBRERO GALAXY (NGC-4594), Astronomy and astrophysics, 285(3), 1994, pp. 739-750
Citations number
25
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
285
Issue
3
Year of publication
1994
Pages
739 - 750
Database
ISI
SICI code
0004-6361(1994)285:3<739:TMEM-A>2.0.ZU;2-T
Abstract
We have applied the Multi-Gaussian Expansion (MGE) technique for a pho tometric analysis of a new high resolution R' image of the central reg ion of NGC 4594 (M 104). The deconvolved image reveals a nucleus offse t by about 0.2 arcsec. from the bulge, and a bright unresolved nuclear disk. Oblate self-gravitating dynamical models have been derived, aga in using the MGE formalism described in Paper I, and compared to previ ously published mean velocity and velocity dispersion profiles. They i mply a centrally condensed dark mass of about 1.0 10(9) M., and a tang entially anisotropic cold inner disk.