| Journal: | Revista mexicana de astronomía y astrofísica |
| Database: | PERIÓDICA |
| System number: | 000348474 |
| ISSN: | 0185-1101 |
| Authors: | Foellmi, C1 Koenigsberger, Gloria2 Georgiev, L3 Toledano, O2 Marchenko, S.V4 Massey, P5 Dall, T.H6 Moffat, A.F.J7 Morrell, N8 Corcoran, M.F9 Kaufer, A10 Nazé, Y11 Pittard, J12 St.-Louis, N7 Fullerton, A13 Massa, D9 Pollock, A.M.T14 |
| Institutions: | 1Laboratoire d'Astrophysique de Grenoble, Grenoble, Isere. Francia 2Universidad Nacional Autónoma de México, Instituto de Ciencias Físicas, Cuernavaca, Morelos. México 3Universidad Nacional Autónoma de México, Instituto de Astronomía, México, Distrito Federal. México 4Western Kentucky University, Department of Physics and Astronomy, Bowling Green, Kentucky. Estados Unidos de América 5Lowell Observatory, Flagstaff, Arizona. Estados Unidos de América 6Gemini Observatory, Hilo, Hawai. Estados Unidos de América 7Universite de Montreal, Departement de Physique, Montreal, Quebec. Canadá 8Observatorio Las Campanas, Vallenar. Chile 9National Aeronautics and Space Administration, X-ray Astrophysics Laboratory, Greenbelt, Maryland. Estados Unidos de América 10European Southern Observatory, La Serena, Coquimbo. Chile 11Universite de Liege, Institut d'Astrophysique et de Geophysique, Lieja. Bélgica 12University of Leeds, School of Physics and Astronomy, Leeds, Yorkshire. Reino Unido 13Space Telescope Science Institute, Greenbelt, Maryland. Estados Unidos de América 14European Space Agency, European Space Astronomy Centre, Madrid. España |
| Year: | 2008 |
| Season: | Abr |
| Volumen: | 44 |
| Number: | 1 |
| Pages: | 3-27 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| Spanish abstract | Presentamos los resultados de una campa~na de observaciones opticas del sistema m ultiple HD 5980, cuya estrella primaria sufri o una erupci on importante en 1994. Atribuyendo la variabilidad de las l neas en emisi on al movimiento orbital de las dos estrellas con un per odo de 19.3 d as, deducimos sus masas. El comportamiento de las l neas fotosf ericas indica que la fuente de \tercera luz" del sistema es probablemente tambi en un sistema binario como fue propuesto por Schweickhardt (2000). Los datos presentados en este art culo estar an p ublicamente disponibles |
| English abstract | We present the results of optical wavelength observations of the unusual SMC eclipsing binary system HD 5980 obtained in 1999 and 2004{2005. Radial velocity curves for the erupting LBV/WR object (star A) and its close WR-like companion (star B) are obtained by deblending the variable emission-line pro les of NIV and NV lines. The derived masses MA = 58 79M and MB = 51 67M , are more consistent with the the stars' location near the top of the HRD than previous estimates. The presence of a wind-wind interaction region is inferred from the orbital phase-dependent behavior of He I P Cygni absorption components. The emission-line intensities continued with the declining trend previously seen in UV spectra. The behavior of the photospheric absorption lines is consistent with the results of Schweickhardt (2000) who concludes that the third object in the combined spectrum, star C, is also a binary system with PstarC 96.5 days, e=0.83 |
| Disciplines: | Física y astronomía |
| Keyword: | Astronomía, Estrellas binarias, Pérdida de masa, Líneas de emisión, Fotósfera |
| Keyword: | Physics and astronomy, Astronomy, Binary stars, Mass loss, Emission lines, Photosphere |
| Full text: | Texto completo (Ver PDF) |
