IUE observations of X-ray sources: HD153919 (4U1700–37), HDE226868 (Cyg X-1), HZ Her (Her X-1)
Autor: | E.P.J. van den Heuvel, Aldo Treves, C. C. Wu, John C. Raymond, H. Gursky, J. B. Hatchings, Donald C. Morton, A. V. Holm, H. M. Johnson, Andrea K. Dupree, M. C. W. Sandford, F. Macchetto, Albert Boggess, F. Ciatti, Lee Hartmann, J. Jugaku, Yoji Kondo, R. Wilson, Roger J. Davis, A. J. Willis |
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Rok vydání: | 1978 |
Předmět: | |
Zdroj: | Nature. 275:400-403 |
ISSN: | 1476-4687 0028-0836 |
Popis: | The first UV spectroscopic measurements of binary X-ray sources with IUE show highly variable emission from a photoionized plasma in the object HZ Her, and give evidence for localized circumsystem material in the binary source Cygnus X-1. In addition, a substantial stellar wind is found in one of the brightest identified X-ray sources HD153919. This system may be surrounded by an extensive H II region unusual in its content of high excitation ion species. |
Databáze: | OpenAIRE |
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