Rapid spin changes around a magnetar fast radio burst
| Autor: | Hu, Chin-Ping, Narita, Takuto, Enoto, Teruaki, Younes, George, Wadiasingh, Zorawar, Baring, Matthew G., Ho, Wynn C. G., Guillot, Sebastien, Ray, Paul S., Guver, Tolga, Rajwade, Kaustubh, Arzoumanian, Zaven, Kouveliotou, Chryssa, Harding, Alice K., Gendreau, Keith C. |
|---|---|
| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41586-023-07012-5 |
| Popis: | Magnetars are neutron stars with extremely high magnetic fields that exhibit various X-ray phenomena such as sporadic sub-second bursts, long-term persistent flux enhancements, and variable rates of rotation period change. In 2020, a fast radio burst (FRB), akin to cosmological millisecond-duration radio bursts, was detected from the Galactic magnetar SGR 1935+2154, confirming the long-suspected association between some FRBs and magnetars. However, the mechanism for FRB generation in magnetars remains unclear. Here we report the X-ray discovery of an unprecedented double glitch in SGR 1935+2154 within a time interval of approximately nine hours, bracketing an FRB that occurred on October 14, 2022. Each glitch involved a significant increase in the magnetar's spin frequency, being among the largest abrupt changes in neutron star rotation ever observed. Between the glitches, the magnetar exhibited a rapid spin-down phase, accompanied by a profound increase and subsequent decline in its persistent X-ray emission and burst rate. We postulate that a strong, ephemeral, magnetospheric wind provides the torque that rapidly slows the star's rotation. The trigger for the first glitch couples the star's crust to its magnetosphere, enhances the various X-ray signals, and spawns the wind that alters magnetospheric conditions that might produce the FRB. Comment: 46 pages, 9figures, 4 tables, a submitted version of Nature 626, 500 (https://www.nature.com/articles/s41586-023-07012-5) |
| Databáze: | arXiv |
| Externí odkaz: |
|