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
Rok vydání:	1978
Předmět:	Physics Interstellar medium H II region Multidisciplinary Binary star Astronomy Photoionization Plasma Astrophysics Spectral resolution Astronomical spectroscopy Ion
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
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e9eba033cc78778b7931eeb3662ffeeb https://doi.org/10.1038/275400a0 Zobrazit plný text záznamu