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Pulse Peak Migration during the Outburst Decay of the Magnetar SGR 1830-0645: Crustal Motion and Magnetospheric Untwisting

  • Authors: George Younes, Samuel K Lander, Matthew G. Baring, Teruaki Enoto, Chryssa Kouveliotou, Zorawar Wadiasingh, Wynn C.G. Ho, Alice K. Harding, Zaven Arzoumanian, Keith Gendreau, Tolga Güver, Chin-Ping Hu, Christian Malacaria, Paul S. Ray, and Tod E. Strohmayer

2022 The Astrophysical Journal Letters 924 L27.

  • Provider: AAS Journals

Caption: Figure 1.

The 0.8–7 keV pulse profile evolution of SGR 1830−0645 with time. The black dotted–dashed, dark-gray dotted, and light-gray solid lines represent the Gaussian centroids of the three peaks during the first day of outburst. A shift, toward the right for the two weaker peaks and the left for the brightest peak, is evident. This shift produces a simpler, nearly sinusoidal, pulse shape four months after outburst onset. The numbers to the right indicate the intervals, in days from outburst onset, that were used to derive each pulse. Adapted from Y21.

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