Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21810805r&link_type=abstract
American Astronomical Society, AAS Meeting #218, #108.05; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
The dense concentration of stars and high velocity dispersions in the Galactic centre imply that stellar collisions frequently occur. Stellar collisions could therefore result in significant mass loss rates. We calculate the amount of stellar mass lost due to indirect and direct stellar collisions and find its dependence on the present-day mass function of stars. We find that the total mass loss rate in the Galactic centre due to stellar collisions is sensitive to the present-day mass function adopted. We use the observed x-ray luminosity in the Galactic centre to preclude any present-day mass functions that result in mass loss rates > 10^-5 M_sun yr^-1 in the vicinity of 1''. For present-day mass functions of the form, dN/dM prop M^-alpha, we constrain the present-day mass function to have a minimum stellar mass less than about 7 M_sun and a power law slope greater than about 1.25.
Loeb Abraham
Rubin Douglas
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