EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING.

Details EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING. EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING.

1995-01-25

arxiv.org/abs/astro-ph/9501091v1

Phys.Rev.Lett. 74 (1995) 2867-2871

Astronomy and Astrophysics

Astrophysics

8 pages, uuencoded compressed PostScript, 4 figures included (400kB). Submitted to Phys Rev Lett.

Scientific paper

10.1103/PhysRevLett.74.2867

We have monitored 8.6 million stars in the Large Magellanic Cloud for 1.1 years and have found 3 events consistent with gravitational microlensing. We place strong constraints on the Galactic halo content in the form of compact lensing objects in the mass range $10^{-4} \msun$ to $10^{-1} \msun$. Three events is fewer than expected for a standard spherical halo of objects in this mass range, but appears to exceed the number expected from known Galactic populations. Fitting a naive spherical halo model to our data yields a MACHO fraction $f = 0.20^{+0.33}_{-0.14}$, which implies a total MACHO mass (inside 50 kpc) of $8.0^{+14}_{-6}\ten{10} \msun$, and a microlensing optical depth $9^{+15}_{-7} \ten{-8}$ ($\sim 68$\% CL).

Affiliated with

Also associated with

No associations

Rating

EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING. 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 EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and EXPERIMENTAL LIMITS ON THE DARK MATTER HALO OF THE GALAXY FROM GRAVITATIONAL MICROLENSING. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-346699