Li I enhancement during a long-duration stellar flare
| dc.contributor.author | Montes Gutiérrez, David | |
| dc.contributor.author | Ramsey, Lawrence W. | |
| dc.date.accessioned | 2023-06-20T20:16:03Z | |
| dc.date.available | 2023-06-20T20:16:03Z | |
| dc.date.issued | 1998-12 | |
| dc.description | This work was supported by the Universidad Complutense de Madrid and the Spanish Direccion General de Investigación Científica y Técnica (DGICYT) under grant PB94-0263, and by National Science Foundation (NSF) grant AST 92-18008. We thank the staff of McDonald observatory for their allocation of observing time and their assistance with our observations. | |
| dc.description.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 Li^-6/Li^-7 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. | |
| dc.description.department | Depto. de Física de la Tierra y Astrofísica | |
| dc.description.faculty | Fac. de Ciencias Físicas | |
| dc.description.refereed | TRUE | |
| dc.description.sponsorship | Universidad Complutense de Madrid (UCM) | |
| dc.description.sponsorship | Dirección General de Investigación Científica y Técnica (DGICYT) | |
| dc.description.sponsorship | National Science Foundation (NSF) | |
| dc.description.status | pub | |
| dc.eprint.id | https://eprints.ucm.es/id/eprint/37906 | |
| dc.identifier.issn | 0004-6361 | |
| dc.identifier.officialurl | http://aa.springer.de/papers/8340001/23000l5.pdf | |
| dc.identifier.relatedurl | http://aa.springer.de | |
| dc.identifier.uri | https://hdl.handle.net/20.500.14352/59977 | |
| dc.issue.number | 1 | |
| dc.journal.title | Astronomy & Astrophysics | |
| dc.language.iso | eng | |
| dc.page.final | L9 | |
| dc.page.initial | L5 | |
| dc.publisher | EDP Sciencies | |
| dc.relation.projectID | PB94-0263 | |
| dc.relation.projectID | AST 92-18008 | |
| dc.rights.accessRights | open access | |
| dc.subject.cdu | 52 | |
| dc.subject.keyword | © Springer Verlag | |
| dc.subject.keyword | A. G. T-tauri stars | |
| dc.subject.keyword | Chromospherically active stars | |
| dc.subject.keyword | Lithium isotope ratio | |
| dc.subject.keyword | RS-canum-venaticorum | |
| dc.subject.keyword | Solar-flares | |
| dc.subject.keyword | Abundances | |
| dc.subject.keyword | Binaries | |
| dc.subject.keyword | Dwarfs | |
| dc.subject.keyword | Pleiades | |
| dc.subject.keyword | Sample | |
| dc.subject.ucm | Astrofísica | |
| dc.subject.ucm | Astronomía (Física) | |
| dc.title | Li I enhancement during a long-duration stellar flare | |
| dc.type | journal article | |
| dc.volume.number | 340 | |
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| dspace.entity.type | Publication | |
| relation.isAuthorOfPublication | 2dfe4286-12c7-4d3a-bfda-d298a90cc8fe | |
| relation.isAuthorOfPublication.latestForDiscovery | 2dfe4286-12c7-4d3a-bfda-d298a90cc8fe |
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