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journal id: "astronomyxandxastrophysics"
| Auteurs | E. Damen, R.A.M.J. Wijers, J. van Paradijs, W. Penninx, T. Oosterbroek, W.H.G. Lewin, F. Jansen | | Titel | Constraints on the inner accretion flow of 4U/MXB 1636-53 (V 801 Arae) from a comparison of X-ray burst and persistent emission |
| Tijdschrift | Astronomy and Astrophysics |
| Jaargang | 233 |
| Jaar | 1990 |
| Nummer | 1 |
| Pagina's | 121-136 |
| ISSN | 00046361 |
| Faculteit | Faculteit der Natuurwetenschappen, Wiskunde en Informatica |
| Instituut/afd. | FNWI: Astronomical Institute Anton Pannekoek (IAP) |
| Trefwoorden | Accretion disks; Binary stars; Emission spectra; Stellar spectra; X-ray astronomy |
| Samenvatting | A detailed analysis is presented of the importance of Comptonization in burst and persistent spectra of the low-mass X-ray binary 4U/MXB 1636-53, and from this analysis it is inferred that the inner accretion flow is geometrically thin. It is found that burst spectra of 1636-53 are very nearly Planckian in shape; from an upper limit to a high-energy excess in these spectra it is inferred that the Thomson scattering optical depth of a possible intervening hot cloud must be less than 1 during bursts, and that the Compton y parameter of that cloud must be less than 0.5. During persistent emission, Thomson optical depth of 4-8, an electron temperature of 2-5 keV, and a value of 0.8-1.1 for y are inferred. |
| Soort document | Artikel |
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