Hard X-ray quiescent emission in magnetars via resonant Compton upscattering

Simple item page
dc.citation.articleNumber012021
dc.citation.journalTitleJournal of Physics: Conference Series
dc.citation.volumeNumber932
dc.contributor.authorBaring, M.G.
dc.contributor.authorWadiasingh, Z.
dc.contributor.authorGonthier, P.L.
dc.contributor.authorHarding, A.K.
dc.date.accessioned2018-07-02T18:19:43Z
dc.date.available2018-07-02T18:19:43Z
dc.date.issued2017
dc.description.abstractNon-thermal quiescent X-ray emission extending between 10 keV and around 150 keV has been seen in about 10 magnetars by RXTE, INTEGRAL, Suzaku, NuSTAR and Fermi-GBM. For inner magnetospheric models of such hard X-ray signals, inverse Compton scattering is anticipated to be the most efficient process for generating the continuum radiation, because the scattering cross section is resonant at the cyclotron frequency. We present hard X-ray upscattering spectra for uncooled monoenergetic relativistic electrons injected in inner regions of pulsar magnetospheres. These model spectra are integrated over bundles of closed field lines and obtained for different observing perspectives. The spectral turnover energies are critically dependent on the observer viewing angles and electron Lorentz factor. We find that electrons with energies less than around 15 MeV will emit most of their radiation below 250 keV, consistent with the turnovers inferred in magnetar hard X-ray tails. Electrons of higher energy still emit most of the radiation below around 1 MeV, except for quasi-equatorial emission locales for select pulse phases. Our spectral computations use a new state-of-the-art, spin-dependent formalism for the QED Compton scattering cross section in strong magnetic fields.
dc.identifier.citationBaring, M.G., Wadiasingh, Z., Gonthier, P.L., et al.. "Hard X-ray quiescent emission in magnetars via resonant Compton upscattering." <i>Journal of Physics: Conference Series,</i> 932, (2017) IOP Publishing: https://doi.org/10.1088/1742-6596/932/1/012021.
dc.identifier.doihttps://doi.org/10.1088/1742-6596/932/1/012021
dc.identifier.urihttps://hdl.handle.net/1911/102334
dc.language.isoeng
dc.publisherIOP Publishing
dc.rightsContent from this work may be used under the terms of theﾠCreative Commons Attribution 3.0 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/3.0/
dc.titleHard X-ray quiescent emission in magnetars via resonant Compton upscattering
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Baring_2017.pdf
Size:
290.86 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Physics and Astronomy Publications