Hard X-ray quiescent emission in magnetars via resonant Compton upscattering
Hard X-ray quiescent emission in magnetars via resonant Compton upscattering
复制标题
通过共振康普顿上散射在磁星中进行硬 X 射线静态发射
DOI:
10.1088/1742-6596/932/1/012021
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Harding, A K
中科院分区:
文献类型:
--
作者:
Baring, M G;Wadiasingh, Z;Gonthier, P L;Harding, A K
Non-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.
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DOI:
10.1086/309357
发表时间:
2000
期刊:
The Astrophysical Journal
影响因子:
--
作者:
P. Gonthier;A. Harding;M. Baring;Rachel M. Costello;C. Mercer
通讯作者:
C. Mercer
影响因子:
6.5
作者:
D. Götz;S. Mereghetti;A. Tiengo;P. Esposito;P. Esposito
通讯作者:
D. Götz;S. Mereghetti;A. Tiengo;P. Esposito;P. Esposito
DOI:
--
发表时间:
2002
期刊:
--
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1088/0004-637x/733/1/61
发表时间:
2011
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Baring;Z. Wadiasingh;P. Gonthier
通讯作者:
P. Gonthier
影响因子:
4.9
作者:
Kuiper, L;Hermsen, W;Mendez, M
通讯作者:
Mendez, M