Pulsed γ-ray emission from magnetar 1E 2259+586

Anomalous X-ray pulsars (AXPs) are thought to be magnetars which are young isolated neutron stars with extremely strong magnetic fields of > $10^{14}$ Gauss. Their tremendous magnetic fields inferred from the spin parameters provide a huge energy reservoir to power the observed X-ray emission. Hi...

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Bibliographic Details
Published in:Journal of astronomy and space sciences 2013, Vol.30 (2), p.83-85
Main Authors: Wu, Jason Hung Kit, Hui, Chung Yue, Huang, Regina Hsiu Hui, Kong, Albert Kwok Hing, Cheng, Kwong Sang, Takata, Jumpei, Tam, Pak Hin Thomas, Wu, Eric Man Ho, Liu, Joe
Format: Article
Language:Korean
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Summary:Anomalous X-ray pulsars (AXPs) are thought to be magnetars which are young isolated neutron stars with extremely strong magnetic fields of > $10^{14}$ Gauss. Their tremendous magnetic fields inferred from the spin parameters provide a huge energy reservoir to power the observed X-ray emission. High-energy emission above 0.3 MeV has never been detected despite intensive search. Here, we present the possible Fermi Large Area Telescope (LAT) detection of ${\gamma}$-ray pulsations above 200 MeV from the AXP, 1E 2259+586, which puts the current theoretical models of ${\gamma}$-ray emission mechanisms of magnetars into challenge. We speculate that the high-energy ${\gamma}$-rays originate from the outer magnetosphere of the magnetar.
ISSN:2093-5587
2093-1409