The Intriguing Distribution of Dark Matter in Galaxies
By P. Salucci, A. Borriello. 2002
25 citations recorded by the source corpus.
We review the most recent evidence for the amazing properties of the density distribution of the dark matter around spiral galaxies. Their rotation curves, coadded according to the galaxy luminosity, conform to an Universal profile which can be represented as the sum of an exponential thin disk term plus a spherical halo term with a flat density core. From dwarfs to giants, these halos feature a constant density region of size r 0 and core density ρ 0 related by ρ 0 = 4.5 × 10-2(r 0/kpc)-2/3M⊙pc-3. At the highest masses ρ 0 decreases exponentially with r 0, revealing a lack of objects with disk masses > 1011 M⊙ and central densities > 1.5 × 10-2 (r 0/kpc)-3 M⊙pc-3 implying a maximum mass of ≈ 2 × 1012 M⊙ for a dark halo hosting a stellar disk. The fine structure of dark matter halos is obtained from the kinematics of a number of suitable low-luminosity disk galaxies. The halo circular velocity increases linearly with radius out to the edge of the stellar disk, implying a constant dark halo density over the entire disk region. The properties of halos around normal spirals provide substantial evidence of a discrepancy between the mass distributions predicted in the Cold Dark Matter scenario and those actually detected around galaxies.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
In Nuclear and High Energy Physics
In Statistical and Nonlinear Physics
Citations in the corpus
- Search for New Physics with Atoms and Molecules (2017, methodology): “Nonetheless, based on numerical models (Bergström et al., 1998) and observations of other similar spiral galaxies (Salucci and Borriello, 2003), it is believed that the Milky Way is embedded within and rotates through a spherical DM halo.”