The discovery of 50 minute periodic absorption events from 4U1915-05

Details The discovery of 50 minute periodic absorption events from 4U1915-05 The discovery of 50 minute periodic absorption events from 4U1915-05

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981stin...8215001w&link_type=abstract

Unknown

Physics

Absorption Spectra, Flux Density, Radiation Distribution, Stellar Mass, White Dwarf Stars, Celestial Bodies, Metallic Stars, Periodic Variations, Stellar Structure

Scientific paper

The steady flux from 4U1916-05 which undergoes periodic absorption dips every 50 minutes was demonstrated. This period represents the underlying orbital period of the system. It is suggested that variations in the depth and duration of these events are caused by a bulge in the edge of the accretion disk, at the point where the gas stream impacts the disk. The mass losing star in this system is probably a low mass white dwarf. The spectrum of the dips indicates that the metallicity of the absorbing material is at least a factor 17 below solar values.

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