Computer Science – Sound
Scientific paper
Dec 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976qjras..17..400w&link_type=abstract
Royal Astronomical Society, Quarterly Journal, vol. 17, Dec. 1976, p. 400-421.
Computer Science
Sound
Binary Stars, Black Holes (Astronomy), Neutron Stars, Rocket Sounding, Satellite Observation, X Ray Sources, Milky Way Galaxy, Periodic Variations, Stellar Evolution, Stellar Mass, Stellar Rotation, Stellar Winds, X Ray Stars
Scientific paper
Rocket and satellite observational data on galactic X-ray sources are reviewed. These sources are seen to exhibit time variations which may be aperiodic, periodic, or quasi-periodic on timescales ranging from msec to months. Variations on timescales from msec to minutes can be understood in terms of the orbital period of material about a black hole, or of the rotation period of an accreting neutron star. Periodic and perhaps quasi-periodic variations on timescales of hours to days reflect the orbital period of the close binary system of which the X-ray source is a member. Variations on longer timescales are not yet understood. They could involve such mechanisms as periastron passage in an eccentric, long-period binary system, hydrodynamical instabilities of accreting material, or fluctuations in a stellar wind.
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