论文标题
中子恒星的磁层中的怪物辐射冲击
Monster radiative shocks in the perturbed magnetospheres of neutron stars
论文作者
论文摘要
中子星的磁层可能会被恒星地震，二元系统中的相互作用或恒星突然崩溃所扰动。扰动通常在KHz带中，并激发磁流失动力波。我们表明，压缩磁层波会浸入怪物冲击中，这可能是宇宙中最强的冲击。冲击是辐射的，即等离子体能在穿过冲击之前辐射。随着带有辐射冲击的KHz波通过磁层扩展，它会产生明亮的X射线爆发。然后，它发射了大约绝热的爆炸波，该波浪将远离中子星。这些结果表明了一种新的机制，用于磁铁的X射线爆发，并支持磁铁X射线活动与快速无线电突发的连接。类似的冲击可能会持续发生在磁性中子星二进制物中，从而产生二进制合并的X射线前体。当中子恒星倒入黑洞时，还可以预测强大的辐射冲击，从而产生明亮的X射线瞬变。
Magnetospheres of neutron stars can be perturbed by star quakes, interaction in a binary system, or sudden collapse of the star. The perturbations are typically in the kHz band and excite magnetohydrodynamic waves. We show that compressive magnetospheric waves steepen into monster shocks, possibly the strongest shocks in the universe. The shocks are radiative, i.e. the plasma energy is radiated before it crosses the shock. As the kHz wave with the radiative shock expands through the magnetosphere, it produces a bright X-ray burst. Then, it launches an approximately adiabatic blast wave, which will expand far from the neutron star. These results suggest a new mechanism for X-ray bursts from magnetars and support the connection of magnetar X-ray activity with fast radio bursts. Similar shocks may persistently occur in magnetized neutron-star binaries, generating an X-ray precursor of the binary merger. Powerful radiative shocks are also predicted in the magnetosphere of a neutron star when it collapses into a black hole, producing a bright X-ray transient.
