Journal of The Korean Astronomical Society (천문학회지)

The Korean Astronomical Society (한국천문학회)
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Correlation Study of Temporal and Emission Properties of Quiescent Magnetars

  • Jiwoo Seo (Department of Astronomy and Space Science, Chungbuk National University) ;
  • Jaewon Lee (Department of Astronomy and Space Science, Chungbuk National University) ;
  • Hongjun An (Department of Astronomy and Space Science, Chungbuk National University)
  • Received : 2022.06.27
  • Accepted : 2023.03.23
  • Published : 2023.12.30
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Abstract

We measured temporal and emission properties of quiescent magnetars using archival Chandra and XMM-Newton data, produced a list of the properties for 17 magnetars, and revisited previously suggested correlations between the properties. Our studies carried out with a larger sample, better spectral characterizations, and more thorough analyses not only confirmed previously-suggested correlations but also found new ones. The observed correlations differ from those seen in other neutron-star populations but generally accord with magnetar models. Specifically, the trends of the intriguing correlations of blackbody luminosity (LBB) with the spin-inferred dipole magnetic field strength (BS) and characteristic age (τc) were measured to be LBB ∝ B1.5S and LBB ∝ τ-0.6c, supporting the twisted magnetosphere and magnetothermal evolution models for magnetars. We report the analysis results and discuss our findings in the context of magnetar models.

Keywords

Acknowledgement

This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIT) (NRF-2022R1F1A1063468 and NRF-2023R1A2C1002718).

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