On the Nature of the LBV/WR Eclipsing Binary System HD 5980
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2004
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| _version_ | 1876473752197267456 |
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| author | G. Koenigsberger |
| author_facet | G. Koenigsberger |
| contents | On the Nature of the LBV/WR Eclipsing Binary System HD 5980 G. Koenigsberger Física, Astronomía y Matemáticas RAYET OUTFLOWS STARS: WOLF STARS: WINDS STARS: BINARIES (ECLIPSING) HD 5980 is a multiple star system in the Small Magellanic Cloud that underwenta luminous blue variable-like eruption in 1993-1994. The erupting star(star A) forms part of a close eclipsing binary whose companion`s (star B) Wolf-Rayet nature has recently been questioned. The data analyzed in this paper coverthe period 1979-2002, and support the WNE classification of star B. The orbitalphase-dependent variations of ultraviolet P Cygni absorption lines imply that thewind speed of star A is 1700{2200 km s1 and that of star B is 2600{3100 km s1.These allow an estimate of the wind-wind collision (wwc) shock cone geometry andline profiles from the wwc region. Given the assumed mass-loss rates, only a smallfraction of the observed emission line profies may originate in the wwc region. Thestar A+star B binary pair is likely the result of evolution with mass transfer and/orevolution with rapid rotation, and provides a magnificent opportunity for studyingthe processes that occur in massive multiple systems at the stages of stellarevolution just prior to the supernova event. 2004 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57140201 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.2 Vol.40 |
| format | Artículo científico |
| id | redalyc_57140201 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | On the Nature of the LBV/WR Eclipsing Binary System HD 5980 G. Koenigsberger Física, Astronomía y Matemáticas RAYET OUTFLOWS STARS: WOLF STARS: WINDS STARS: BINARIES (ECLIPSING) On the Nature of the LBV/WR Eclipsing Binary System HD 5980 G. Koenigsberger Física, Astronomía y Matemáticas RAYET OUTFLOWS STARS: WOLF STARS: WINDS STARS: BINARIES (ECLIPSING) HD 5980 is a multiple star system in the Small Magellanic Cloud that underwenta luminous blue variable-like eruption in 1993-1994. The erupting star(star A) forms part of a close eclipsing binary whose companion`s (star B) Wolf-Rayet nature has recently been questioned. The data analyzed in this paper coverthe period 1979-2002, and support the WNE classification of star B. The orbitalphase-dependent variations of ultraviolet P Cygni absorption lines imply that thewind speed of star A is 1700{2200 km s1 and that of star B is 2600{3100 km s1.These allow an estimate of the wind-wind collision (wwc) shock cone geometry andline profiles from the wwc region. Given the assumed mass-loss rates, only a smallfraction of the observed emission line profies may originate in the wwc region. Thestar A+star B binary pair is likely the result of evolution with mass transfer and/orevolution with rapid rotation, and provides a magnificent opportunity for studyingthe processes that occur in massive multiple systems at the stages of stellarevolution just prior to the supernova event. 2004 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57140201 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.2 Vol.40 |
| title | On the Nature of the LBV/WR Eclipsing Binary System HD 5980 |
| topic | Física, Astronomía y Matemáticas RAYET OUTFLOWS STARS: WOLF STARS: WINDS STARS: BINARIES (ECLIPSING) |
| url | https://www.redalyc.org/articulo.oa?id=57140201 |