2022/06/12 by Long, Jane SiNan, kong, Albert K. H., Wu, Kinwah +4
#FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE)
paper · doi:10.48550/arxiv.2206.05702
We have presented the first joint \it XMM-Newton and \it NuSTAR analysis of the millisecond pulsar (MSP) binary PSR J1653-0158. The 75-minute orbital period inferred from optical and gamma-ray observations together with the 1.97-ms pulsation in the gamma-rays indicate that this system is the most compact Black Widow MSP system known to date. The orbital period was not detected in the \it XMM-Newton and \it NuSTAR data, probably due to insufficient photon counts obtained in the observations. Fitting the joint X-ray spectrum of PSR J1653-0158 with a power law gives a photon index Γ= 1.71 ± 0.09. The X-ray luminosity of the source in the (0.2-40)~keV band is deduced to be 1.18 × 1031 \rm erg~s-1, for an adopted distance of 0.84~kpc. We have shown that the broad-band X-ray spectrum can be explained by synchrotron radiation from electrons accelerated in the intra-binary shock, and the gamma-rays detected in the \it Fermi data are curvature radiations from electrons and positrons in the pulsar magnetosphere. Our kinematic analysis of the Tidarren systems PSR~J1653--0158 and PSR~J1311--3430 indicates that the two Tidarren systems are likely to have originated in the Galactic Disk.