论文标题
Swift J1818.0 $ - $ 1607的Spectropolopolimetrictrimetrictrimetrictrimetrimetrimetrictriment属性：A 1.4 s无线电磁场
Spectropolarimetric properties of Swift J1818.0$-$1607: a 1.4 s radio magnetar
论文作者
论文摘要
Soft-Gamma Repeater Swift J1818.0 $ - $ 1607只是发现脉冲无线电排放的第五磁铁。使用Parkes射电望远镜的Ultra Wideband低接收器系统，我们对Swift J1818.0 $ -1607进行了3小时的观察。在$ p = 1.363 $ s的旋转期间折叠数据，我们获得了宽带极化概况和通量密度测量值，涵盖了704-4032 MHz之间的无线电频率。测量后，然后校正PULSAR的旋转量$ 1442.0 \ pm 0.2 $ rad m $^{ - 2} $，我们发现无线电配置文件在整个宽的观测带中线性极化的80-100％之间，在低频下，我们在低频下散布了散布宽广的宽敞频率。我们还测量了$α= -2.26^{+0.02} _ { - 0.03} $的陡峭光谱指数在我们的大频率范围内，与平坦或倒置光谱的显着偏差通常与射频大声磁盘相关。通量密度的陡峭频谱和时间上升与类似磁场的，旋转供电的脉冲星PSR J1119 $ -6127的行为具有一定的相似之处。这使我们推测Swift J1818.0 $ - 1607美元可能代表了旋转驱动的脉冲星和磁铁之间的附加链接。
The soft-gamma repeater Swift J1818.0$-$1607 is only the fifth magnetar found to exhibit pulsed radio emission. Using the Ultra-Wideband Low receiver system of the Parkes radio telescope, we conducted a 3 h observation of Swift J1818.0$-$1607. Folding the data at a rotation period of $P = 1.363$ s, we obtained wideband polarization profiles and flux density measurements covering radio frequencies between 704-4032 MHz. After measuring, and then correcting for the pulsar's rotation measure of $1442.0 \pm 0.2$ rad m$^{-2}$, we find the radio profile is between 80-100 per cent linearly polarized across the wide observing band, with a small amount of depolarization at low frequencies that we ascribe to scatter broadening. We also measure a steep spectral index of $α= -2.26^{+0.02}_{-0.03}$ across our large frequency range, a significant deviation from the flat or inverted spectra often associated with radio-loud magnetars. The steep spectrum and temporal rise in flux density bears some resemblance to the behaviour of the magnetar-like, rotation-powered pulsar PSR J1119$-$6127. This leads us to speculate that Swift J1818.0$-$1607 may represent an additional link between rotation-powered pulsars and magnetars.
