Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997mnras.288..237o&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 288, Issue 1, pp. 237-244.
Astronomy and Astrophysics
Astronomy
21
Shock Waves, Stars: Early-Type, Galaxy: Centre, Galaxies: Nuclei, Infrared: Stars, X-Rays: Stars
Scientific paper
We point out that a high number density of stars in the core of a dense star cluster, such as the central stellar cluster at the Galactic Centre, where many stars possess strong stellar winds, should result in collisions of those winds. The wind collisions in the dense stellar core at the Galactic Centre would result in the production of strong X-ray flares with a rate of ~10^-4 (N_w/10^3)^2 yr^-1 and a duration of ~1 week, where N_w is the number of the wind-producing stars in the core. The presence of a massive black hole would enhance the stellar density around it and would make the collisions of the winds in the core substantially more frequent. Collisions of the stellar winds in the cluster also have a number of interesting observable implications, including the generation of gamma-rays by particles accelerated by the shocks from the colliding winds. These processes are also expected to be relevant to compact regions of intense star formation elsewhere.
Genzel Reinhard
Ozernoy Leonid M.
Usov Vladimir V.
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