【摘 要】
：
利用直接解调方法分析COMPTEL VP1数据, 得到了脉冲星Geminga10—30 MeV脉冲辐射存在的证据: 全位相及分位相成像均得到了Geminga.分位相成像结果显示,光变曲线的峰值位于pul
【机 构】
：
中国科学院高能物理研究所宇宙线和高能天体物理开放实验室北京
论文部分内容阅读
利用直接解调方法分析COMPTEL VP1数据, 得到了脉冲星Geminga10—30 MeV脉冲辐射存在的证据: 全位相及分位相成像均得到了Geminga.分位相成像结果显示,光变曲线的峰值位于pulse 1附近,而其它位相区域只能给出上限.由于成像分析不存在选择效应,该成像结果表明, Geminga在MeV能区仍存在脉冲辐射.虽然Geminga的弱MeV辐射使得很难就VP1数据作时间分析,但仍得到了一些周期信号的迹象,并且与成像结果不相矛盾.进一步考察EGRET观测Geminga在30 MeV以上的强度比pulse 2/pulse 1,发现在VP1观测的较低能区, pulse 1有渐强于pulse2的趋势,这和我们在MeV能区的成像及时间分析结果相一致.成像得到的流强表明, Geminga的能谱至少在10 MeV以上不应出现偏折.
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