エディントン光度を超える降着型コンパクト天体の系統的研究

在上一个财政年度，胡博士参加了NICER磁星和磁层小组，并为几项工作做出了贡献，包括发现了一颗新的无线电发射磁星Swift J1818.0-1627，这暗示了磁星和高磁场旋转动力脉冲星之间的重要联系。正在利用射电望远镜进行后续观测。至于吸积的致密天体，胡博士和上田发现了脉动ULX，M51 ULX-7的周期性下降。脉冲ULX的这种独特特性意味着高倾角不利于强波束方案。这一结果为磁层吸积提供了重要的线索，并表明ULX-7具有高磁场。此外，一些有趣的来源，发现了半自动定时算法在胡博士的JSPS任期内。今后将深入调查。

During the last fiscal year, Dr. Hu participated in the NICER Magnetar and Magnetosphere group and contributed to several works, including the discovery of a new radio-emitting magnetar, Swift J1818.0-1627, which hints at an important link between magnetars and high-magnetic-field rotation-powered pulsar. Follow-up observations using radio telescopes are ongoing. As for the accreting compact objects, Drs. Hu and Ueda have discovered periodic dips in a pulsating ULX, M51 ULX-7. This unique property among pulsating ULXs implies a high inclination angle that disfavors the strong-beaming scenario. The result provides an important hint for magnetospheric accretion and suggests a high magnetic field of ULX-7. Moreover, a few interesting sources are discovered by the semi-automatic timing algorithm developed during Dr. Hu's JSPS tenure. They will be deeply investigated in the future.