The Rotation Velocity Attributable to Dark Matter at Intermediate Radii in Disk Galaxies
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]
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|Source:||Astrophysical Journal, The|
|01_McGaugh_The_Rotation_Velocity_2007.pdf||633.47 kB||Adobe PDF||Request a copy|
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