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Pulsed γ-ray emission from magnetar 1E 2259+586
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 한국우주과학회 2013 Journal of Astronomy and Space Sciences Vol.30 No.2
Anomalous X-ray pulsars (AXPs) are thought to be magnetars which are young isolated neutron stars with extremely strongmagnetic fields of >1014 Gauss. Their tremendous magnetic fields inferred from the spin parameters provide a huge energyreservoir to power the observed X-ray emission. High-energy emission above 0.3 MeV has never been detected despiteintensive search. Here, we present the possible Fermi Large Area Telescope (LAT) detection of γ-ray pulsations above 200MeV from the AXP, 1E 2259+586, which puts the current theoretical models of γ-ray emission mechanisms of magnetars intochallenge. We speculate that the high-energy γ-rays originate from the outer magnetosphere of the magnetar.
Pulsed γ-ray emission from magnetar 1E 2259+586
Jason Hung Kit Wu,허종우,Regina Hsiu Hui Huang,Albert Kwok Hing Kong,Kwong Sang Cheng,Jumpei Takata,Pak Hin Thomas Tam,Eric Man Ho Wu,Joe Liu 한국우주과학회 2013 Journal of Astronomy and Space Sciences Vol.30 No.2
Anomalous X-ray pulsars (AXPs) are thought to be magnetars which are young isolated neutron stars with extremely strong magnetic fields of >1014 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 γ-ray pulsations above 200MeV from the AXP, 1E 2259+586, which puts the current theoretical models of γ-ray emission mechanisms of magnetars into challenge. We speculate that the high-energy γ-rays originate from the outer magnetosphere of the magnetar.