HI Velocity Dispersions and Flaring: Disk Masses and the Shape of Dark Matter Halos

Details HI Velocity Dispersions and Flaring: Disk Masses and the Shape of Dark Matter Halos HI Velocity Dispersions and Flaring: Disk Masses and the Shape of Dark Matter Halos

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1240..387v&link_type=abstract

HUNTING FOR THE DARK: THE HIDDEN SIDE OF GALAXY FORMATION. Edited by Victor P. Debattista and Cristina C. Popescu AIP Conferen

Computer Science

Dark Matter, Spiral Galaxies, Stellar Dynamics, Galactic Centre, Dark Matter, Spiral Galaxies, Kinematics, Dynamics, And Rotation, Galactic Center, Bar, Circumnuclear Matter, And Bulge

Scientific paper

I briefly review the use of measurements of the HI velocity dispersion and gas layer flaring in galaxy disks to determine the baryonic mass of the disks. I compare that to results from stellar dynamics. In systems with low-mass disks, flaring can also provide information on the flattening of the dark matter halos. New results from the thesis of Jess O'Brien are summarized, in particular an application to UGC 7321 that shows the dark matter halo in that galaxy to be close to spherical.

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