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The Rotation Velocity Attributable to Dark Matter at Intermediate Radii in Disk Galaxies

McGaugh, Stacy; de Blok, Willem; Schombert, J. M.; Kuzio De Naray, Rachel; Kim, J. H.


We examine the amplitude of the rotation velocity that can be attributed to the dark matter halos of disk galaxies, focusing on well-measured intermediate radii. The data for 60 galaxies spanning a large range of mass and Hubble types, taken together, are consistent with a dark halo velocity log Vh = C + B log R with C = 1.47-0.19+0.15 and B ≈1/2 over the range of 1 < R < 74 kpc. The range in C stems from different choices of the stellar mass estimator, from minimum to maximum disk. For all...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1086/511807


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