Evidence of H alpha periodicities in LS I+61303

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dc.creatorZamanov, R. K.
dc.creatorMarti, J.
dc.creatorParedes, J. M.
dc.creatorFabregat, J.
dc.creatorRibo, M.
dc.creatorTarasov, A. E.
dc.date1999-09-14
dc.date.accessioned2026-07-07T06:27:04Z
dc.date.available2026-07-07T06:27:04Z
dc.descriptionWe present the results of analyzing H$α$ spectra of the radio emitting X-ray binary LS I+61303. For the first time, the same 26.5 d radio period is clearly detected in the H$α$ emission line. Moreover, the equivalent width and the peak separation of the H$α$ emission line seem also to vary over a time scale of 1600 days. This points towards the $\sim4$ yr modulation, detected in the radio outburst amplitude, being probably a result of variations in the mass loss rate of the Be star and/or density variability in the circumstellar disk. In addition, the dependence of the peak separation from the equivalent width informs us that the LS I+61303 circumstellar disk is among the densest of Be-stars.
dc.description8 pages, 5 figures, LaTeX, uses aa.cls. Accepted for publication in A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/9909233
dc.identifierhttp://arxiv.org/abs/astro-ph/9909233
dc.identifierAstron.Astrophys. 351 (1999) 543-550
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97307
dc.subjectAstrophysics
dc.titleEvidence of H alpha periodicities in LS I+61303
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