Low-radio-frequency eclipses of the redback pulsar J2215+5135 observed in the image plane with LOFAR.
Low-radio-frequency eclipses of the redback pulsar J2215+5135 observed in the image plane with LOFAR.
复制标题
使用 LOFAR 在像平面上观测到的红背脉冲星 J2215 5135 的低射频日食。
DOI：
10.1093/mnras/stw794
复制
发表时间：
2016
影响因子：
4.8
通讯作者：
P. Zarka
中科院分区：
文献类型：
--
作者：
J. Broderick;R. Fender;R. Breton;A. Stewart;A. Rowlinson;J. Swinbank;J. Hessels;T. Staley;A. V. D. Horst;M. Bell;D. Carbone;Y. Cendes;S. Corbel;J. Eislöffel;H. Falcke;J. Grießmeier;T. Hassall;P. Jonker;M. Kramer;M. Kuniyoshi;C. Law;S. Markoff;G. Molenaar;M. Piętka;L. Scheers;M. Serylak;B. Stappers;S. Veen;J. V. Leeuwen;R. Wijers;R. Wijnands;M. Wise;P. Zarka
某些类型的双毫秒脉冲星(即“黑寡妇”和“红背”)的日食通常是利用高时间分辨率、“波束形成”的射电观测来研究的。然而，它们也可以在由干涉数据生成的图像中被检测到。作为一个更大的成像项目的一部分，以表征无线电频率为200兆赫的可变和瞬变的天空，我们已经盲目地探测到红背系统PSR J2215+5135作为低频阵列(LOFAR)的可变感兴趣源。利用两周-六个月的周期观测，我们发现了日食持续时间与频率有关的初步证据(∝ν-0.4%)，这样脉冲星在较低的频率下被遮挡的时间更长，这与其他类似来源的波束形成的研究大体一致。此外，在成像数据中对日食的探测表明，日食介质吸收了脉冲发射，而不是散射。我们的研究也展示了利用当前一代低频射电望远镜在广域成像探测中发现脉冲星的前景。
The eclipses of certain types of binary millisecond pulsars (i.e. 'black widows' and 'redbacks') are often studied using high-time-resolution, 'beamformed' radio observations. However, they may also be detected in images generated from interferometric data. As part of a larger imaging project to characterize the variable and transient sky at radio frequencies <200 MHz, we have blindly detected the redback system PSR J2215+5135 as a variable source of interest with the Low-Frequency Array (LOFAR). Using observations with cadences of two weeks - six months, we find preliminary evidence that the eclipse duration is frequency dependent (∝ν-0.4), such that the pulsar is eclipsed for longer at lower frequencies, in broad agreement with beamformed studies of other similar sources. Furthermore, the detection of the eclipses in imaging data suggests an eclipsing medium that absorbs the pulsed emission, rather than scattering it. Our study is also a demonstration of the prospects of finding pulsars in wide-field imaging surveys with the current generation of low-frequency radio telescopes.
影响因子：
8.7
作者：
Abdo, A. A.;Ajello, M.;Yang, Z.
通讯作者：
Yang, Z.
影响因子：
6.5
作者：
van Haarlem, M. P.;Wise, M. W.;van Zwieten, J.
通讯作者：
van Zwieten, J.