Apoastron Shift Constraints on Dark Matter Distribution at the Galactic Center

Details Apoastron Shift Constraints on Dark Matter Distribution at the Galactic Center Apoastron Shift Constraints on Dark Matter Distribution at the Galactic Center

2007-07-30

arxiv.org/abs/0707.4423v1

Phys.Rev.D76:062001,2007

Astronomy and Astrophysics

Astrophysics

in press on Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.062001

The existence of dark matter (DM) at scales of few pc down to $\simeq 10^{-5}$ pc around the centers of galaxies and in particular in the Galactic Center region has been considered in the literature. Under the assumption that such a DM clump, principally constituted by non-baryonic matter (like WIMPs) does exist at the center of our galaxy, the study of the $\gamma$-ray emission from the Galactic Center region allows us to constrain both the mass and the size of this DM sphere. Further constraints on the DM distribution parameters may be derived by observations of bright infrared stars around the Galactic Center. Hall and Gondolo \cite{hallgondolo} used estimates of the enclosed mass obtained in various ways and tabulated by Ghez et al. \cite{Ghez_2003,Ghez_2005}. Moreover, if a DM cusp does exist around the Galactic Center it could modify the trajectories of stars moving around it in a sensible way depending on the DM mass distribution. Here, we discuss the constraints that can be obtained with the orbit analysis of stars (as S2 and S16) moving inside the DM concentration with present and next generations of large telescopes. In particular, consideration of the S2 star apoastron shift may allow improving limits on the DM mass and size.

Affiliated with

Also associated with

No associations

Rating

Apoastron Shift Constraints on Dark Matter Distribution at the Galactic Center 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 Apoastron Shift Constraints on Dark Matter Distribution at the Galactic Center, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apoastron Shift Constraints on Dark Matter Distribution at the Galactic Center will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-359942