Quasiperiodic Peak Energy Oscillations in X-Ray Bursts from SGR J1935+2154

Simple item page
dc.citation.articleNumberL27en_US
dc.citation.journalTitleThe Astrophysical Journal Lettersen_US
dc.citation.volumeNumber956en_US
dc.contributor.authorRoberts, Oliver J.en_US
dc.contributor.authorBaring, Matthew G.en_US
dc.contributor.authorHuppenkothen, Danielaen_US
dc.contributor.authorKouveliotou, Chryssaen_US
dc.contributor.authorGöğüş, Ersinen_US
dc.contributor.authorKaneko, Yukien_US
dc.contributor.authorLin, Linen_US
dc.contributor.authorHorst, Alexander J. van deren_US
dc.contributor.authorYounes, Georgeen_US
dc.date.accessioned2024-05-03T15:51:08Zen_US
dc.date.available2024-05-03T15:51:08Zen_US
dc.date.issued2023en_US
dc.description.abstractMagnetars are young neutron stars powered by the strongest magnetic fields in the Universe (1013–15 G). Their transient X-ray emission usually manifests as short (a few hundred milliseconds), bright, energetic (∼1040–41 erg) X-ray bursts. Since its discovery in 2014, SGR J1935+2154 has become one of the most prolific magnetars, exhibiting very active bursting episodes and other fascinating events, such as pulse timing antiglitches and fast radio bursts. Here we present evidence for possible 42 Hz (24 ms) quasiperiodic oscillations in the ν F ν spectrum peak energy (E p ) identified in a unique burst detected with the Fermi Gamma-ray Burst Monitor in 2022 January. While quasiperiodic oscillations have been previously reported in the intensity of magnetar burst light curves, quasiperiodic oscillations in E p have not. We also find an additional event from the same outburst that appears to exhibit a similar character in E p , albeit of lower statistical quality. For these two exceptional transients, such E p oscillations can be explained by magnetospheric density and pressure perturbations. For burst-emitting plasma consisting purely of e + e − pairs, these acoustic modes propagate along a highly magnetized flux tube of length up to around L ∼ 130 neutron star radii, with L being lower if ions are present in the emission zone. Detailed time-resolved analyses of other magnetar bursts are encouraged to evaluate the rarity of these events and their underlying mechanisms.en_US
dc.identifier.citationRoberts, O. J., Baring, M. G., Huppenkothen, D., Kouveliotou, C., Göğüş, E., Kaneko, Y., Lin, L., Horst, A. J. van der, & Younes, G. (2023). Quasiperiodic Peak Energy Oscillations in X-Ray Bursts from SGR J1935+2154. The Astrophysical Journal Letters, 956(1), L27. https://doi.org/10.3847/2041-8213/acfcaden_US
dc.identifier.digitalRoberts_2023_ApJL_956_L27en_US
dc.identifier.doihttps://doi.org/10.3847/2041-8213/acfcaden_US
dc.identifier.urihttps://hdl.handle.net/1911/115538en_US
dc.language.isoengen_US
dc.publisherIOP Publishing Ltden_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license. Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleQuasiperiodic Peak Energy Oscillations in X-Ray Bursts from SGR J1935+2154en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Roberts_2023_ApJL_956_L27.pdf
Size:
1.22 MB
Format:
Adobe Portable Document Format
Download
Collections
Faculty Publications
Physics and Astronomy Publications