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| Authors | A. Patruno, A. Watts, M. Klein Wolt, R. Wijnands, M. van der Klis | | Title | 1 Hz flaring in SAX J1808.4–3658: flow instabilities near the propeller stage |
| Journal | Astrophysical Journal |
| Volume | 707 |
| Year | 2009 |
| Issue | 2 |
| Pages | 1296-1309 |
| ISSN | 0004637X |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Astronomical Institute Anton Pannekoek (IAP) |
| Abstract | We present a simultaneous periodic and aperiodic timing study of the accreting millisecond X-ray pulsar SAX J1808.4-3658. We analyze five outbursts of the source and for the first time provide a full and systematic investigation of the enigmatic phenomenon of the 1 Hz flares observed during the final stages of some of the outbursts. We show that links between pulsations and 1 Hz flares might exist, and suggest that they are related with hydrodynamic disk instabilities that are triggered close to the disk-magnetosphere boundary layer when the system is entering the propeller regime. |
| Document type | Article |
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