Phase-resolved spectroscopy of Geminga shows rotating hot spot(s)

被引：41
|
作者：
Caraveo, PA
De Luca, A
Mereghetti, S
Pellizzoni, A
Bignami, GF
机构：
[1] CNR, Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy
[2] Univ Toulouse 3, CNRS, Ctr Etud Spatiale Rayonnements, F-31062 Toulouse, France
[3] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy
来源：
SCIENCE | 2004年 / 305卷 / 5682期
关键词：
D O I：
10.1126/science.1097173
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Isolated neutron stars are seen in x-rays through their nonthermal and/or surface thermal emissions. X-ray Multimirror Mission-Newton observations of the Geminga pulsar show a 43-electron volt spectrum from the whole neutron star surface, as well as a power-law component above 2 kiloelectron volts. In addition, we have detected a hot (170 electron volts) thermal emission from an similar to60-meter-radius spot on the pulsar's surface. Such a thermal emission, only visible at selected phase intervals, may be coming from polar hot spot(s), long thought to exist as a result of heating from magnetospheric accelerated particles. It may provide the missing link between the x-ray and gamma-ray emission of the pulsar.
引用
收藏
页码：376 / 379
页数：4
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