SCIENTIA SINICA Physica, Mechanica & Astronomica, Volume 48, Issue 3: 039510(2018) https://doi.org/10.1360/SSPMA2017-00252

Detecting magnetars with Einstein Probe

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  • ReceivedSep 17, 2017
  • AcceptedOct 9, 2017
  • PublishedDec 28, 2017
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Magnetars are active X-ray and soft gamma-ray sources in the sky, and are believed to be young neutron stars powered by their ultra-high surface magnetic fields. With the all-sky monitoring capability of the Einstein Probe (EP), we expect to be able to find 3 new magnetars through their X-ray outburst activity, and will also be able to study the X-ray activities of more than 20 currently known magnetars. The EP’s observations will thus help estimate the total number of magnetars in the Milky Way and understand their formation channels in stellar evolution and supernova explosions. In addition, multi-wavelength observations can be conducted once a magnetar is found to be in the active state with EP. The studies will help understand the magnetars’ overall emission properties and the underlying physical processes. Although it is rare, magnetar-like activity was also seen in other classes of young neutron stars. EP will be able to monitor those neutron stars, for finding more such events and thus help determine if any intrinsic property between magnetars and other neutron stars could play a key role in inducing such activity.

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我们感谢南京大学周平和陈阳同意我们使用图1, 也感谢加拿大麦吉尔大学Kaspi V M同意我们使用图2.


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  • Figure 1

    (Color online) Discovery of a magnetar near the supernova remnant Kes 79 (adapted from ref. [3] by permission). The position of the magnetar is marked by the red circle: in 2007 March, the source’s emission was below the detection limit of X-ray observations, but in 2008 September, the source was visible.

  • Figure 2

    Number of discovered magnetars as a function of years (adapted from ref. [2] by permission). The dashed and dash-dotted lines mark the launch times of the Swift and Fermi satellite, respectively.

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