Dark Matter Density Profiles Of Disk Galaxies: The Nuclear Spiral Connection

Details Dark Matter Density Profiles Of Disk Galaxies: The Nuclear Spiral Connection Dark Matter Density Profiles Of Disk Galaxies: The Nuclear Spiral Connection

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21724608s&link_type=abstract

American Astronomical Society, AAS Meeting #217, #246.08; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Scientific paper

Hubble Space Telescope (HST) images have revealed that nuclear spiral structure exists in the centers of many disk galaxies. The morphology of this spiral pattern depends on the properties of the nuclear gravitational potential, and so it has been suggested that given an image of the nuclear spiral, it should be possible to determine the mass distribution of its host galaxy. Furthermore, the morphology can also reveal whether the spiral exists in a pseudo-isothermal dark matter potential or a cuspy dark matter potential. In this poster, we use HST images of the central regions of disk galaxies to measure the spiral arm pitch angle of nuclear spirals as a function of radius. From this we determine the best halo density models that describe the mass distributions in these galaxies.

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