Bursts from High-magnetic-field Pulsars Swift J1818.0-1607 and PSR J1846.4-0258

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dc.citation.articleNumber8
dc.citation.issueNumber1
dc.citation.journalTitleThe Astrophysical Journal
dc.citation.volumeNumber942
dc.contributor.authorUzuner, Mete
dc.contributor.authorKeskin, Özge
dc.contributor.authorKaneko, Yuki
dc.contributor.authorGöğüş, Ersin
dc.contributor.authorRoberts, Oliver J.
dc.contributor.authorLin, Lin
dc.contributor.authorBaring, Matthew G.
dc.contributor.authorGüngör, Can
dc.contributor.authorKouveliotou, Chryssa
dc.contributor.authorHorst, Alexander J. van der
dc.contributor.authorYounes, George
dc.date.accessioned2023-04-25T14:47:56Z
dc.date.available2023-04-25T14:47:56Z
dc.date.issued2022
dc.description.abstractThe detection of magnetar-like bursts from highly magnetic (B > 1013 G) rotation-powered pulsars (RPPs) opened the magnetar population to yet another group of neutron stars. At the same time the question arose as to whether magnetar-like bursts from high-B RPPs have similar characteristics to bursts from known magnetar sources. We present here our analyses of the Fermi Gamma-ray Burst Monitor (GBM) data from two magnetar candidates, Swift J1818.0−1607 (a radio-loud magnetar) and PSR J1846.4−0258. Both sources entered active bursting episodes in 2020 triggering Fermi-GBM in 2020 and in early 2021. We searched for untriggered bursts from both sources and performed temporal and spectral analyses on all events. Here, we present the results of our comprehensive burst search and analyses. We identified 37 and 58 bursts that likely originated from Swift J1818.0−1607 and PSR J1846.4−0258, respectively. We find that the bursts from these sources are shorter on average than typical magnetar bursts. In addition, their spectra are best described with a single blackbody function with kT ∼ 10–11 keV; several relatively bright events, however, show higher energy emission that could be modeled with a cutoff power-law model. We find that the correlation between the blackbody emitting area and the spectral temperature for the burst ensemble of each pulsar deviates from the ideal Stefan–Boltzmann law, as it does for some burst-active magnetars. We interpret this characteristic as being due to the significant radiation anisotropy expected from optically thick plasmas in very strong magnetic fields.
dc.identifier.citationUzuner, Mete, Keskin, Özge, Kaneko, Yuki, et al.. "Bursts from High-magnetic-field Pulsars Swift J1818.0-1607 and PSR J1846.4-0258." <i>The Astrophysical Journal,</i> 942, no. 1 (2022) IOP Publishing: https://doi.org/10.3847/1538-4357/aca482.
dc.identifier.digitalUzuner_2023_ApJ_942_8
dc.identifier.doihttps://doi.org/10.3847/1538-4357/aca482
dc.identifier.urihttps://hdl.handle.net/1911/114830
dc.language.isoeng
dc.publisherIOP Publishing
dc.rightsOriginal content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleBursts from High-magnetic-field Pulsars Swift J1818.0-1607 and PSR J1846.4-0258
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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