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arXiv · 2008.12585

A multi-wavelength study of PSR J1119$-$6127 after 2016 outburst

H. -H. Wang·L. C. -C. Lin·S. Dai·J. Takata·K. L. Li.·C. -P. Hu·X. Hou
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Abstract

PSR~J1119$-$6127, a high-magnetic field pulsar detected from radio to high-energy wavelengths, underwent a magnetar-like outburst beginning on July 27, 2016. In this paper, we study the post-outburst multi-wavelength properties of this pulsar from the radio to GeV bands and discuss its similarity with the outburst of the magnetar XTE~J1810$-$197. In phase-resolved spectral analysis of 0.5--10\,keV X-ray data collected in August 2016, the on-pulse and off-pulse spectra are both characterized by two blackbody components and also require a power-law component similar to the hard X-ray spectra of magnetars. This power-law component is no longer distinguishable in data from December, 2016. We likewise find that there was no substantial shift between the radio and X-ray pulse peaks after the 2016 X-ray outburst. The gamma-ray pulsation after the X-ray outburst is confirmed with data taken after 2016 December and the pulse structure and phase difference between the gamma-ray and radio peaks ($\sim$0.4 cycle) are also consistent with those before the X-ray outburst. These multi-wavelength observations suggest that the re-configuration of the global magnetosphere after 2016 magnetar-like outburst at most continued for about six months. We discuss the evolution of the X-ray emission after the 2016 outburst with the untwisting magnetosphere model.

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H. -H. Wang, L. C. -C. Lin, S. Dai, J. Takata, K. L. Li., C. -P. Hu, X. Hou. 2020-09-02. A multi-wavelength study of PSR J1119$-$6127 after 2016 outburst. https://doi.org/10.3847/1538-4357%2Fabb3c4

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