Li I enhancement during a long-duration stellar flare

David Montes, Lawrence William Ramsey

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We report the possible detection of a Li I λ6708 Å line enhancement during an unusual long-duration optical flare in the recently discovered, X-ray/EUV selected, chromospherically active binary 2RE J0743+224. The Li I equivalent width (EW) variations follow the temporal evolution of the flare and large changes are observed in the intensity of the line. The maximum Li I enhancement (40% in EW) occurs just after the maximum chromospheric emission observed in the flare. A significant increase of the 6Li/7Li isotopic ratio is also detected. No significant simultaneous variations are detected in other photospheric lines. Neither line blends nor starspots seem to be the primary cause of the observed Li I line variation. From all this we suggest that this Li I enhancement is produced by spallation reactions during the flare.

Original languageEnglish (US)
JournalAstronomy and Astrophysics
Volume340
Issue number1
StatePublished - Dec 1 1998

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Li I enhancement during a long-duration stellar flare'. Together they form a unique fingerprint.

Cite this