X-Ray spectral evolution of PSR~J2032+4127 during the 2017 periastron passage

Partha Sarathi Pal; P. H. Thomas Tam; Yudong Cui; Kwan Lok Li; Albert K. H. Kong; Can Gungor

doi:10.3847/1538-4357/ab31a7

X-Ray spectral evolution of PSR~J2032+4127 during the 2017 periastron passage

High Energy Astrophysical Phenomena 2019-10-08 v2

Authors: Partha Sarathi Pal , P. H. Thomas Tam , Yudong Cui , Kwan Lok Li , Albert K. H. Kong , Can Gungor

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Abstract

We report X-ray data analysis results obtained from Chandra, XMM-Newton, NuSTAR and Swift observations of PSR J2032+4127 taken before, during, and after the periastron on 2017 November 13. We found the first clear evidence of a change in the X-ray spectral index over the passage period, thanks to a broad and sensitive spectral coverage by XMM-Newton and NuSTAR. We analysed the joint XMM-Newton and NuSTAR observation epochs with power-law and broken power-law model. We have obtained change in spectral parameters before and after the periastron passage for both models. The spectra get softened after the passage. The evolution of the spectral index and break energy before and after the periastron may indicate a change in the physical state of shock-accelerated electrons.

Keywords

PSR J2032+4127 X-ray spectral evolution periastron passage Chandra XMM-Newton NuSTAR shock-accelerated electrons

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@article{arxiv.1907.05685,
  title  = {X-Ray spectral evolution of PSR~J2032+4127 during the 2017 periastron passage},
  author = {Partha Sarathi Pal and P. H. Thomas Tam and Yudong Cui and Kwan Lok Li and Albert K. H. Kong and Can Gungor},
  journal= {arXiv preprint arXiv:1907.05685},
  year   = {2019}
}

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11 Pages, 4 Figures, Published in The Astrophysical Journal

X-Ray spectral evolution of PSR~J2032+4127 during the 2017 periastron passage

Abstract

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