Abstract
We report on high-dispersion optical spectroscopic observations of the Be/X-ray binary A 0535+262/V725 Tau during a giant outburst in 2009 November/December, and after it. The observed emission line profiles, reflecting the structure of the geometrically thin circumstellar envelope of the Be star (Be disk), show drastic variabilities, and indicate the existence of a warped component. The enhanced blue shoulder seen after periastron passage implies a gas stream from a dense part of the Be disk to the neutron star.
Original language | English |
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Pages (from-to) | L25-L29 |
Journal | Publications of the Astronomical Society of Japan |
Volume | 63 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2011 Aug 25 |
Externally published | Yes |
Keywords
- Be - stars
- Binaries
- Emission-line - stars
- Spectroscopic - stars
- Stars
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science