Constraining the cosmic abundance of stellar remnants with multi-TeV gamma-rays

Details Constraining the cosmic abundance of stellar remnants with multi-TeV gamma-rays Constraining the cosmic abundance of stellar remnants with multi-TeV gamma-rays

1999-03-11

arxiv.org/abs/astro-ph/9903181v1

Astrophys.J. 523 (1999) L77-L80

Astronomy and Astrophysics

Astrophysics

6 pages, Submitted to ApJ Letters

Scientific paper

10.1086/312243

If galactic halos contain stellar remnants, the infra-red flux from the remnant progenitors would contribute to the opacity of multi-TeV gamma-rays. The multi-TeV gamma-ray horizon is established to be at a redshift z>0.034 by the observation of the blazar Mkn501 . By requiring that the optical depth due to \gamma \gamma ---> e+ e- be less than one for a source at z=0.034 we limit the cosmological density of stellar remnants, Omega_rm \le (2-4) x 10^-3 h_70^-1 (h_70 is the Hubble constant in units of 70 km sec-1 Mpc-1) and thus strongly constrain stellar remnants as a cosmologically significant source of dark matter.

Affiliated with

Also associated with

No associations

Rating

Constraining the cosmic abundance of stellar remnants with multi-TeV gamma-rays 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 Constraining the cosmic abundance of stellar remnants with multi-TeV gamma-rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining the cosmic abundance of stellar remnants with multi-TeV gamma-rays will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-667026