Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252..690h&link_type=abstract
Astrophysical Journal, Part 1, vol. 252, Jan. 15, 1982, p. 690-696.
Astronomy and Astrophysics
Astrophysics
11
Binary Stars, Emission Spectra, Line Spectra, Magnetic Stars, White Dwarf Stars, X Ray Sources, Abundance, Light Curve, Outgassing, Periodic Variations, Spectrograms, Spectrum Analysis, Stellar Mass Accretion, Stellar Mass Ejection, Stellar Rotation, Stellar Temperature
Scientific paper
All phases of the 81 minute orbit of the magnetic X-ray binary 2A 0311-227 are covered in a series of single-trailed spectrograms of duration 25 minutes each, and resolution 2 A. Superposition of the data shows that an extremely complex line-structure and variation exist, which are phase-locked with the orbit. Previous measures by the authors are confirmed. An improved value for the orbital period is derived by comparing observations separated by 9 months. The appearance and velocities of the lines are shown. At present, no quantitative models exist to describe the complex gas streaming. Some evidence is given that at least two regions (poles), separated by less than 180 deg, of different temperature, are present.
Cowley Anne Pyne
Crampton David
Fisher Wesley A.
Hutchings John B.
Liller Martha Hazen
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