A NuSTAR Observation of the Gamma-ray Emitting Millisecond Pulsar PSR J1723-2837
Abstract
We report on the first NuSTAR observation of the gamma-ray emitting millisecond pulsar binary PSR J1723–2837. X-ray radiation up to 79 keV is clearly detected, and the simultaneous NuSTAR and Swift spectrum is well described by an absorbed power law with a photon index of ~1.3. We also find X-ray modulations in the 3–10, 10–20, 20–79, and 3–79 keV bands at the 14.8 hr binary orbital period. All of these are entirely consistent with previous X-ray observations below 10 keV. This new hard X-ray observation of PSR J1723–2837 provides strong evidence that the X-rays are from the intrabinary shock via an interaction between the pulsar wind and the outflow from the companion star. We discuss how the NuSTAR observation constrains the physical parameters of the intrabinary shock model.
Additional Information
© 2017 The American Astronomical Society. Received 2017 February 8; revised 2017 March 26; accepted 2017 March 29; published 2017 April 25. A.K.H.K. is supported by the Ministry of Science and Technology of the Republic of China (Taiwan) through grants 105-2112-M-007-033-MY2, 105-2119-M-007-028-MY3, and 106-2918-I-007-005. C.Y.H. is supported by the National Research Foundation of Korea through grants 2014R1A1A2058590 and 2016R1A5A1013277. J.T. is supported by NSFC grants of Chinese Government under 11573010 and U1631103. Facilities: NuSTAR, Swift.Attached Files
Accepted Version - 1703.10164.pdf
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Additional details
- Eprint ID
- 75575
- DOI
- 10.3847/1538-4357/aa6aa2
- Resolver ID
- CaltechAUTHORS:20170331-101324182
- Created
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2017-03-31Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field
- Caltech groups
- NuSTAR