Studying magnetic fields of ultraluminous X-ray pulsars using different accretion torques

Studying magnetic fields of ultraluminous X-ray pulsars using different accretion torques
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使用不同吸积力矩研究超光 X 射线脉冲星的磁场

DOI:
10.1016/j.jheap.2021.04.002
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发表时间:
2021-04
影响因子:
3.8
通讯作者:
Tong H.
Tong H.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chen X.;Wang W.;Tong H.

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相似文献

超铝X射线(ULX)天体的磁场是理解天体性质和吸积物理的关键参数。然而,这些ULX超导磁体中的典型磁场值仍在争论中。我们使用了六种不同的扭矩模型来研究ULX整流器的磁场,以了解导出的磁场如何随不同模型而变化,并确定哪些模型更适合ULX整流器。我们采用了7颗已确认的ULX双星M82 X-2、ULX NGC 7793 P13、ULX NGC 5907、NGC 300 ULX 1、NGC 1313 X-2、M51 ULX-7、Swift J0243.6+6124以及一颗潜在的ULX双星SMC X-3的当前可用周期、周期导数和通量数据。这些ULX超导磁体的磁场受到两个物理条件的约束:自旋上升过程和接近平衡。我们检查了磁场估计对不同扭矩模型的可能依赖性。计算结果表明Ghosh和Lamb(1979)、Wang(1995)、Kluenniak和Rappaport(2007)和坎贝尔(2012)的吸积力矩模型更可能支持ULX双星的磁星模型,而Lovelace等人(1995)的模型通常预测正常中子星的磁场。我们的结果结合其他独立的方法的影响进行了讨论,这将有助于我们理解这些ULX双星的性质和旋转行为。
The magnetic field of ultraluminous X-ray (ULX) pulsars is the key parameter to understand the nature and accretion physics. However, the typical magnetic field values in these ULX pulsars are still under debate. We used six different torque models to study the magnetic fields of ULX pulsars, to see how derived magnetic fields change with different models, and to determine which models are more suitable for ULX pulsars. We took the currently available period, period derivative, and flux data of 7 confirmed ULX pulsars, M82 X-2, ULX NGC 7793 P13, ULX NGC 5907, NGC 300 ULX1, NGC 1313 X-2, M51 ULX-7, Swift J0243.6+6124, plus one potential ULX pulsars, SMC X-3. The magnetic fields of these ULX pulsars were constrained from two physical conditions: the spin-up process and near equilibrium. We checked possible dependence of the magnetic field estimations on the different torque models. The calculations suggest the accretion torque models by Ghosh and Lamb (1979), Wang (1995), Kluźniak and Rappaport (2007) and Campbell (2012) are more likely to support magnetar models for ULX pulsars, while Lovelace et al. (1995)'s model generally predicts the magnetic field in normal neutron stars. Implications of our results combined with other independent methods are also discussed, which will help us to understand the nature and rotational behavior of these ULX pulsars.
DOI: 10.1086/309649
发表时间: 1995-08
期刊: The Astrophysical Journal Letters
影响因子: --
作者:
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通讯作者: Y.-M. Wang
DOI: 10.1086/155606
发表时间: 1977-10
期刊: The Astrophysical Journal
影响因子: --
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吸积磁星:连接超光X射线脉冲星和慢脉动X射线脉冲星
DOI: 10.1093/mnras/sty2989
发表时间: 2018-06
影响因子: 4.8
作者:
Tong H.;Wang W.
通讯作者: Wang W.
DOI: 10.1111/j.1745-3933.2008.00478.x
发表时间: 2008-02
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