Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008rmxaa..44...71r&link_type=abstract
Revista Mexicana de Astronomía y Astrofísica Vol. 44, pp. 71-83 (2008) (http://www.astroscu.unam.mx/~rmaa/)
Astronomy and Astrophysics
Astronomy
4
Galaxies: Individual (Ngc 3359), Galaxies: Kinematics And Dynamics, Galaxies: Spiral
Scientific paper
In this work we have determined a dynamical model for NGC 3359. This is a strongly barred spiral galaxy with a complex structure, within which we can see an annular zone of intense star formation. In this work we present self consistent numerical simulations of molecular gas in NGC 3359; and using the potential derived from an I band image, we attempt to find the parameters responsible for the kinematics and morphology of the observed gas. The best results are obtained for a two pattern speed model: the central region (up to 15 arcsec) corresponding to the nuclear bar which rotates with a Ω_{s}=100 km s^{-1} kpc^{-1}; and the main bar + outer spiral, decoupled from the nuclear region, which rotates with a angular velocity, Ω_{p}=27 km s^{-1} kpc^{-1}. The model successfully reproduces the complex structure in Hα of the galaxy in the internal 20 arcsec zone, which cannot really be explained with a unique mode pattern.
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