6533b837fe1ef96bd12a2dd4
RESEARCH PRODUCT
Evidence of Halpha periodicities in LSI+61·303
R. K. ZamanovJosep Martí RibasJosep Maria Paredes I PoyJaime FabregatMarc Ribó GomisA. E. Tarasovsubject
AstrofísicaX-ray binariesRadioastronomiaAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Cosmology and Extragalactic AstrophysicsRadio astronomyAstrophysicsStarsAstrophysics::Galaxy AstrophysicsEstelsEstels binaris de raigs Xdescription
We present the results of analyzing H$\alpha$ 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$\alpha$ emission line. Moreover, the equivalent width and the peak separation of the H$\alpha$ 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-01-01 |