Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-21
Astronomy and Astrophysics
Astrophysics
version to appear in Astrophysical Journal letters (labels on Fig. 3 corrected)
Scientific paper
10.1086/528984
A new scenario for the emission of high-energy gamma-rays from dark matter annihilation around massive black holes is presented. A black hole can leave its parent halo, by means of gravitational radiation recoil, in a merger event or in the asymmetric collapse of its progenitor star. A recoiled black hole which moves on an almost-radial orbit outside the virial radius of its central halo, in the cold dark matter background, reaches its apapsis in a finite time. Near or at the apapsis passage, a high-density wake extending over a large radius of influence, forms around the black hole. It is shown that significant gamma-ray emission can result from the enhancement of neutralino annihilation in these wakes. At its apapsis passage, a black hole is shown to produce a flash of high-energy gamma-rays whose duration is determined by the mass of the black hole and the redshift at which it is ejected. The ensemble of such black holes in the Hubble volume is shown to produce a diffuse high-energy gamma-ray background whose magnitude is compared to the diffuse emission from dark matter haloes alone.
Colin Jacques
Mohayaee Roya
Silk Joe
No associations
LandOfFree
Gamma-ray emission from dark matter wakes of recoiled black holes 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 Gamma-ray emission from dark matter wakes of recoiled black holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gamma-ray emission from dark matter wakes of recoiled black holes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-256055