Drastic spectroscopic variability of the Be/X-Ray binary Ariel 0535+262/V725 Tau during and after the 2009 giant Outburst

Yuuki Moritani, Daisaku Nogami, Atsuo T. Okazaki, Akira Imada, Eiji Kambe, Satoshi Honda, Osamu Hashimoto, Kohei Ichikawa

Research output: Contribution to journalLetterpeer-review

18 Citations (Scopus)

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 languageEnglish
Pages (from-to)L25-L29
JournalPublications of the Astronomical Society of Japan
Volume63
Issue number4
DOIs
Publication statusPublished - 2011 Aug 25
Externally publishedYes

Keywords

  • Be - stars
  • Binaries
  • Emission-line - stars
  • Spectroscopic - stars
  • Stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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