Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.218..439g&link_type=abstract
IN ESA 4th European IUE Conf. p 439-442 (SEE N84-35135 24-88)
Astronomy and Astrophysics
Astronomy
6
Infrared Astronomy, Optical Emission Spectroscopy, Stellar Spectra, Ultraviolet Spectroscopy, X Ray Sources, Absorption Spectra, Iue, Stellar Mass Ejection
Scientific paper
Data of A 0535+26/HDE 245770 from IR, optical, UV and X wavelengths before and after one of the strongest X-ray outbursts, expected on the basis of the 111-day periodicity of this source and detected by the ASTRON satellite on February 1, 1984 are presented. The IUE observations performed on Nov 10, 1983 and Jan 23, 1984 are entirely compatible with earlier measurements. Optical spectra taken immediately before the X-ray outburst show H gamma in absorption and H alpha in weakened emission. In September and in January 1984 before the X-ray outburst the star presents diminished IR excess. Mass loss is discussed.
Bartolini Corrado
Bisnovatyi-Kogan Gennadi S.
Burger Marc
de Loore Camiel
Ferrari-Toniolo Marco
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