Pintore, F;
Bernardini, F;
Mereghetti, S;
Esposito, P;
Turolla, R;
Rea, N;
Coti Zelati, F;
... Zane, S; + view all
(2016)
The variable spin-down rate of the transient magnetar XTE J1810--197.
Monthly Notices of the Royal Astronomical Society
, 458
(2)
pp. 2088-2093.
10.1093/mnras/stw351.
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Abstract
We have analyzed XMM-Newton and Chandra observations of the transient magnetar XTE J1810-197, spanning more than 11 years, from the initial phases of the 2003 outburst to the current quiescent level. We investigated the evolution of the pulsar spin period and we found evidence for two distinct regimes: during the outburst decay, the spin derivative (nu_dot) was highly variable in the range -(2-4.5)x10^-13 Hz/s, while during quiescence the spin-down rate was more stable at an average value of -1x10^{-13} Hz/s. Only during ~3000 days (from MJD 54165 to MJD 56908) in the quiescent stage, it was possible to find a phase-connected timing solution, with nu_dot = -4.9x10^{-14} Hz/s, and a positive second frequency derivative, nu_dotdot = 1.8x10^{-22} Hz/s. These results are in agreement with the behavior expected if the outburst of XTE J1810-197 was due to a strong magnetospheric twist.
| Type: | Article |
|---|---|
| Title: | The variable spin-down rate of the transient magnetar XTE J1810--197 |
| Location: | UK |
| Identifier: | 10.1093/mnras/stw351 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stw351 |
| Language: | English |
| Additional information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
| Keywords: | Magnetic fields, stars: magnetars, stars: neutron, pulsars: individual: (XTE J1810–197), X-rays: stars |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1508061 |
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