XMM-Newton and NuSTAR Observations of the Compact Millisecond Pulsar Binary PSR J1653-0158

Jane Sinan Long, Albert K.H. Kong, Kinwah Wu, Jumpei Takata, Qin Han, David C.Y. Hui, Kwan Lok Li

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4 Citations (Scopus)


We have presented the first joint XMM-Newton and 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 XMM-Newton and 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 "= 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 erg s-1, for an adopted distance of 0.84 kpc. We have shown that the broadband X-ray spectrum can be explained by synchrotron radiation from electrons accelerated in the intrabinary shock, and the gamma-rays detected in the 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.

Original languageEnglish
Article number17
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 2022 Jul 1

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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