Abstract
We present the results of a 73 ks long Chandra observation of the dipping source X 1624 - 490. During the observation a complex dip lasting 4 h is observed. We analyse the persistent emission detecting, for the first time in the 1st-order spectra of X 1624 - 490, an absorption line associated to Ca XX We confirm the presence of the Fe XXV K-alpha and Fe XXVI K-alpha absorption lines with a larger accuracy with respect to a previous XMM observation. Assuming that the line widths are due to a bulk motion or a turbulence associated to the coronal activity, we estimate that the lines have been produced in a photoionized absorber between the coronal radius and the outer edge of the accretion disk.
| Lingua originale | English |
|---|---|
| pagine (da-a) | 289-295 |
| Numero di pagine | 7 |
| Rivista | ASTRONOMY & ASTROPHYSICS |
| Volume | 463 |
| Stato di pubblicazione | Published - 2007 |
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All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
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Di Salvo, T., D'Ai', A., Iaria, R., Robba, N., & Lavagetto, G. (2007). Chandra observation of the Big Dipper X 1624-490. ASTRONOMY & ASTROPHYSICS, 463, 289-295.