Discovery of X-ray pulsations from the next Geminga, PSR J1836+5925

L. C.C. Lin, C. Y. Hui, K. T. Li, J. Takata, C. P. Hu, A. K.H. Kong, D. C.C. Yen, Y. Chou

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We report recent XMM-Newton investigations of PSR J1836+5925, the "next Geminga," which determined an X-ray pulsation of ∼173.3 ms. Its X-ray periodicity is consistent with the γ-ray ephemeris at the same epoch. The X-ray folded light curve has a sinusoidal structure that is different from the double-peaked γ-ray pulse profile. We have also analyzed the X-ray phase-averaged spectra which shows that the X-ray emission from PSR J1836+5925 is thermal dominant. This suggests that the X-ray pulsation mainly originates from the modulated hot spot on the stellar surface.

Original languageEnglish
Article numberL8
JournalAstrophysical Journal Letters
Issue number1
StatePublished - 20 Sep 2014


  • Gamma rays: general
  • Pulsars: general
  • Pulsars: individual (PSR J1836+5925)
  • Radiation mechanisms: non-thermal
  • Radiation mechanisms: thermal
  • X-rays: general


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