Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-08-30
EAS Publ.Ser.20:301-302,2006
Astronomy and Astrophysics
Astrophysics
2 pages, 1 figure, poster contribution to the proceedings of the XXIst IAP Colloquium "Mass Profiles and Shapes of Cosmologica
Scientific paper
10.1051/eas:20060100
Using cosmological N-body simulations we study the line-of-sight velocity distribution of dark matter haloes focusing on the lowest-order even moments, dispersion and kurtosis, and their application to estimate the mass profiles of cosmological structures. For each of the ten massive haloes selected from the simulation box we determine the virial mass, concentration and the anisotropy parameter. In order to emulate observations from each halo we choose randomly 300 particles and project their velocities and positions along the line of sight and on the surface of the sky, respectively. After removing interlopers we calculate the profiles of the line-of-sight velocity moments and fit them with the solutions of the Jeans equations. The estimates of virial mass, concentration parameter and velocity anisotropy obtained in this way are in good agreement with the values found from the full 3D analysis.
Gottloeber Stefan
Lokas Ewa L.
Mamon Gary A.
Wojtak Radoslaw
No associations
LandOfFree
Velocity moments of dark matter haloes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Velocity moments of dark matter haloes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Velocity moments of dark matter haloes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-20170