The Local Halo Density

Details The Local Halo Density The Local Halo Density

1995-05-08

arxiv.org/abs/astro-ph/9505039v2

Astrophys.J.449:L123-L126,1995

Astronomy and Astrophysics

Astrophysics

7 pages, 2 figures. uuencoded postscript file with figures; final version (minor revisions) to appear in Astrophysical Journal

Scientific paper

10.1086/309652

For almost twenty years models of the Galaxy have included a dark halo responsible for supporting a substantial fraction of the local rotation velocity and a flat rotation curve at large distances. Estimates of the local halo density range from $2\times 10^{-25}\gcmm3$ to $10\times 10^{-25}\gcmm3$. By careful modeling of the Galaxy, taking account of the evidence that dark halos are flattened and recent microlensing data, we arrive at a more quantitative estimate, $9.2^{+3.8}_{-3.1}\times 10^{-25}\gcmm3$. Microlensing toward the LMC indicates that only a small fraction, less than about 30\%, can be in the form of MACHOs, consistent with the idea that most of the halo consists of cold dark matter particles.

Affiliated with

Also associated with

No associations

Rating

The Local Halo Density 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 The Local Halo Density, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Local Halo Density will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1909