| Autor: |
Morales, R., Fabian, A. C., Reynolds, C. S. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2001, Vol. 599 Issue 1, p790, 4p |
| Abstrakt: |
The variable warm absorber seen with ASCA in the X-ray spectrum of MCG—630-15 shows complex time behaviour in which the optical depth of OVIII anticorrelates with the flux whereas that of OVII is unchanging. The explanation in terms of a two zone absorber has since been challenged by BeppoSAX observations. These present a more complicated behaviour for the OVIII edge. We demonstrate here that the presence of a third, intermediate, zone can explain all the observations. In practice, warm absorbers are likely to be extended, multi-zone regions of which only part causes directly observable absorption edges at any given time. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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