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http://hdl.handle.net/2445/45407
Title: | Evidence of Halpha periodicities in LSI+61·303 |
Author: | Zamanov, R. K. Martí Ribas, Josep Paredes i Poy, Josep Maria Fabregat, Jaime Ribó Gomis, Marc Tarasov, A. E. |
Keywords: | Estels Estels binaris de raigs X Radioastronomia Astrofísica Stars X-ray binaries Radio astronomy Astrophysics |
Issue Date: | 1999 |
Publisher: | Springer Verlag |
Abstract: | 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. |
Note: | Versió postprint del document publicat en paper |
It is part of: | Astronomy and Astrophysics, 1999, vol. 351, num. 2, p. 543-550 |
URI: | http://hdl.handle.net/2445/45407 |
ISSN: | 0004-6361 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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152770.pdf | 318.47 kB | Adobe PDF | View/Open |
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