Synthetic Observations of Rotation Curves and the Properties of Disk Galaxies

Details Synthetic Observations of Rotation Curves and the Properties of Disk Galaxies Synthetic Observations of Rotation Curves and the Properties of Disk Galaxies

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..421..256g&link_type=abstract

Galaxies in Isolation: Exploring Nature Versus Nurture, proceedings of a conference held 12 to 15 May 2009 in Granada, Spain. Ed

Astronomy and Astrophysics

Astronomy

Scientific paper

We performed synthetic observations of a disk galaxy MHD simulation in order to study the effects of non-circular motions on the modeling of the mass distribution of the galaxy due to spiral structure. We found that the tested methods (slit spectroscopy and ring-averaged velocities) yield rotation curves that are systematically above the circular velocity corresponding to the imposed background potential. When mass models are fitted to the measured rotation curves, the resulting total mass is similar to that of the background potential, but the fit yields more centrally concentrated mass distributions.

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