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Title: 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.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
  2. Department of Astronomy and Space Science, Chungnam National University, Daejeon (Korea, Republic of)
  3. Institute of Particle Physics and Astronomy, Huazhong University of Science and Technology (China)
  4. Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824 (United States)
  5. School of Physics and Astronomy, Sun Yat-sen University, Zhuhai 519082 (China)
Publication Date:
OSTI Identifier:
22663675
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 839; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC GAMMA SOURCES; GAMMA RADIATION; HARD X RADIATION; INTERACTIONS; KEV RANGE; PULSARS; SPECTRA; STARS; STELLAR WINDS

Citation Formats

Kong, A. K. H., Hui, C. Y., Takata, J., Li, K. L., and Tam, P. H. T., E-mail: akong@phys.nthu.edu.tw, E-mail: cyhui@cnu.ac.kr. A NuSTAR Observation of the Gamma-Ray Emitting Millisecond Pulsar PSR J1723–2837. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA6AA2.
Kong, A. K. H., Hui, C. Y., Takata, J., Li, K. L., & Tam, P. H. T., E-mail: akong@phys.nthu.edu.tw, E-mail: cyhui@cnu.ac.kr. A NuSTAR Observation of the Gamma-Ray Emitting Millisecond Pulsar PSR J1723–2837. United States. doi:10.3847/1538-4357/AA6AA2.
Kong, A. K. H., Hui, C. Y., Takata, J., Li, K. L., and Tam, P. H. T., E-mail: akong@phys.nthu.edu.tw, E-mail: cyhui@cnu.ac.kr. Thu . "A NuSTAR Observation of the Gamma-Ray Emitting Millisecond Pulsar PSR J1723–2837". United States. doi:10.3847/1538-4357/AA6AA2.
@article{osti_22663675,
title = {A NuSTAR Observation of the Gamma-Ray Emitting Millisecond Pulsar PSR J1723–2837},
author = {Kong, A. K. H. and Hui, C. Y. and Takata, J. and Li, K. L. and Tam, P. H. T., E-mail: akong@phys.nthu.edu.tw, E-mail: cyhui@cnu.ac.kr},
abstractNote = {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.},
doi = {10.3847/1538-4357/AA6AA2},
journal = {Astrophysical Journal},
number = 2,
volume = 839,
place = {United States},
year = {Thu Apr 20 00:00:00 EDT 2017},
month = {Thu Apr 20 00:00:00 EDT 2017}
}