[40.13] The galactic disk thickness and the mass of spherical component.

AAS 202nd Meeting, May 2003
Session 40 Galaxies
Poster, Wednesday, May 28, 2003, 10:00am-6:45pm, West Exhibit Hall

[40.13] The galactic disk thickness and the mass of spherical component.

D. Bizyaev (University of Texas at El Paso), A.V. Khoperskov (Volgograd State University (Russia)), N. Tiurina (Sternberg astronomical Institute)

We present results of numerical modeling made for the galactic stellar disk embedded in the spherical halo. The non-linear dynamics of bending instabilities developed in the disk is studied. The axisymmetrical bending mode is considered as a main factor increasing the disk thickness. The model dependence between the disk thickness and the halo to disk mass ratio M_h/M_d is inferred. The modeling results enables us to estimate the dark halo mass for several edge-on galaxies: UGC 6080, NGC 4738, UGC 9556, UGC 9422, NGC 5170, NGC 891, and UGC 8286. The obtained values of M_h/M_d for the galaxies considered are of order of 1 - 2.

The author(s) of this abstract have provided an email address for comments about the abstract: dmbiz@sai.msu.ru

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