论文标题
X射线摄影量伽玛射线爆发的磁性进动的证据
Evidence for magnetar precession in X-ray afterglows of gamma-ray bursts
论文作者
论文摘要
许多伽马射线爆发之后是延长的发射期。至少在某些情况下，突发的余辉可能由快速旋转的高磁性中子恒星提供动力，由于电磁波和引力波发射，该恒星旋转。这种残留物可能在其生命的早期阶段就可以强烈进攻，这会导致X射线光度的调制，因为系统的三轴性随着时间的推移而演变。 Using a radiation profile appropriate for a precessing, oblique rotator, we find that Swift-XRT data of a long (080602) and a short (090510) burst matches the model with significantly higher accuracy (mean-square residuals dropping by $\gtrsim 200 \%$ in the early stages of the extended emission) than for an orthogonal rotator.我们将其解释为新生儿磁铁中进动的证据。
Many gamma-ray bursts are followed by periods of extended emission. At least in some cases, the burst afterglow may be powered by a rapidly rotating, highly-magnetised neutron star, which spins down due to electromagnetic and gravitational wave emission. Such a remnant is likely to strongly precess in the early stages of its life, which would lead to modulations in the X-ray luminosity as the triaxiality of the system evolves over time. Using a radiation profile appropriate for a precessing, oblique rotator, we find that Swift-XRT data of a long (080602) and a short (090510) burst matches the model with significantly higher accuracy (mean-square residuals dropping by $\gtrsim 200 \%$ in the early stages of the extended emission) than for an orthogonal rotator. We interpret this as evidence for precession in newborn magnetars.
