Spin equilibrium with or without gravitational wave emission: the case of XTE J1814-338 and SAX J1808.4-3658
| Authors |
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| Publication date | 2011 |
| Journal | Astrophysical Journal Letters |
| Volume | Issue number | 738 |
| Number of pages | 5 |
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| Abstract |
In this Letter we present a new analysis of the torques acting on the accreting millisecond X-ray pulsars SAX J1808.4-3658 and XTE J1814-338, and show how our results can be used to constrain theoretical models of the spin evolution. In particular, we find upper limits on any spin-up/down phase of XTE J1814-338 of at 95% confidence level. We examine the possibility that a gravitational wave torque may be acting in these systems and suggest that a more likely scenario is that both systems are close to spin equilibrium, as set by the disk/magnetosphere interaction. |
| Document type | Article |
| Language | English |
| Published at |
https://doi.org/10.1088/2041-8205/738/1/L14
(Final published version)
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