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

Journal of Astronomy and Space Sciences

卷:30

Chung Yue Hui¹  Eric Man Ho Wu²  Jumpei Takata²  Kwong Sang Cheng²  Regina Hsiu Hui Huang³  Pak Hin Thomas Tam³  Joe Liu³  Jason Hung Kit Wu³  Albert Kwok Hing Kong³ 

[1] Department of Astronomy and Space Science, Chungnam National University, Daejeon 305-764, Korea;

[2] Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong;

[3] Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu, Taiwan;

关键词: pulsars;    gamma-rays;   

DOI  :  10.5140/JASS.2013.30.2.083

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown