Exploring the intrabinary shock from the redback millisecond pulsar PSR J2129-0429

C. Y. Hui, C. P. Hu, S. M. Park, J. Takata, K. L. Li, P. H.T. Tam, L. C.C. Lin, A. K.H. Kong, K. S. Cheng, Chunglee Kim

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We have investigated the intrabinary shock emission from the redback millisecond pulsar PSR J2129-0429 with XMM-Newton and Fermi. Orbital modulation in X-ray and UV can be clearly seen. The X-ray modulation of this pulsar has a double-peaked structure with a dip in between. The observed X-rays are non-thermal dominant and can be modeled by a power-law with Γ ∼ 1.2. An intrabinary shock may have been the origin of the observed X-rays with the UV light curve resulting from the ellipsoidal modulation of the companion. Modeling the UV light curve requires a large viewing angle. The heating effect of the UV light curve is found to be negligible which suggests the high energy radiation beam of PSR J2129-0429 is not directed toward its companion. On the other hand, no significant orbital modulation can be found in γ-rays which suggests the majority of the γ-rays come from the pulsar.

Original languageEnglish
Article numberL27
JournalAstrophysical Journal Letters
Issue number2
Publication statusPublished - 2015 Mar 10

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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