Production of TeV gamma-radiation in the vicinity of the supermassive black hole in the giant radiogalaxy M87

Details Production of TeV gamma-radiation in the vicinity of the supermassive black hole in the giant radiogalaxy M87 Production of TeV gamma-radiation in the vicinity of the supermassive black hole in the giant radiogalaxy M87

2007-04-24

arxiv.org/abs/0704.3282v2

Astronomy and Astrophysics

Astrophysics

11 pages, ApJ, in print

Scientific paper

10.1086/522199

Although the giant radiogalaxy M 87 harbors many distinct regions of broad-band nonthermal emission, the recently reported fast variability of TeV gamma rays from M 87 on a timescale of days strongly constrains the range of speculations concerning the possible sites and scenarios of particle acceleration responsible for the observed TeV emission. A natural production site of this radiation is the immediate vicinity of the central supermassive mass black hole (BH). Because of the low bolometric luminosity, the nucleus of M 87 is effectively transparent for gamma rays up to energy of 10 TeV, which makes this source an ideal laboratory for study of particle acceleration processes close to the BH event horizon. We critically analyse different possible radiation mechanisms in this region, and argue that the observed very high-energy gamma ray emission can be explained by the inverse Compton emission of ultrarelativistic electron-positron pairs produced through the development of an electromagnetic cascade in the BH magnetosphere. We demonstrate, through detailed numerical calculations of acceleration and radiation of electrons in the magnetospheric vacuum gap, that this ``pulsar magnetosphere like'' scenario can satisfactorily explain the main properties of TeV gamma-ray emission of M 87.

Affiliated with

Also associated with

No associations

Rating

Production of TeV gamma-radiation in the vicinity of the supermassive black hole in the giant radiogalaxy M87 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 Production of TeV gamma-radiation in the vicinity of the supermassive black hole in the giant radiogalaxy M87, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of TeV gamma-radiation in the vicinity of the supermassive black hole in the giant radiogalaxy M87 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-707026