学术探索
学术期刊
新闻热点
数据分析
智能评审

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
相关论文
共 25 条
[1]   The magnetic field of an isolated neutron star from X-ray cyclotron absorption lines [J].
Bignami, GF ;
Caraveo, PA ;
De Luca, A ;
Mereghetti, S .
NATURE, 2003, 423 (6941) :725-727
[2]   Geminga: Its phenomenology, its fraternity, and its physics [J].
Bignami, GF ;
Caraveo, PA .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1996, 34 :331-381
[3]   AN IDENTIFICATION FOR GEMINGA (2CG 195+04) 1E 0630+178 - A UNIQUE OBJECT IN THE ERROR BOX OF THE HIGH-ENERGY GAMMA-RAY SOURCE [J].
BIGNAMI, GF ;
CARAVEO, PA ;
LAMB, RC .
ASTROPHYSICAL JOURNAL, 1983, 272 (01) :L9-&
[4]   Geminga's tails: A pulsar bow shock probing the interstellar medium [J].
Caraveo, PA ;
Bignami, GF ;
DeLuca, A ;
Mereghetti, S ;
Pellizzoni, A ;
Mignani, R ;
Tur, A ;
Becker, W .
SCIENCE, 2003, 301 (5638) :1345-1347
[5]   Parallax observations with the Hubble Space Telescope yield the distance to Geminga [J].
Caraveo, PA ;
Bignami, GF ;
Mignani, R ;
Taff, LG .
ASTROPHYSICAL JOURNAL, 1996, 461 (02) :L91-L94
[6]   Multicomponent X-ray emissions from regions near or on the pulsar surface [J].
Cheng, KS ;
Zhang, L .
ASTROPHYSICAL JOURNAL, 1999, 515 (01) :337-350
[7]   POLAR-CAP MODELS OF GAMMA-RAY PULSARS - EMISSION FROM SINGLE POLES OF NEARLY ALIGNED ROTATORS [J].
DAUGHERTY, JK ;
HARDING, AK .
ASTROPHYSICAL JOURNAL, 1994, 429 (01) :325-330
[8]   XMM-Newton and VLT observations of the isolated neutron star 1E 1207.4-5209 [J].
De Luca, A ;
Mereghetti, S ;
Caraveo, PA ;
Moroni, A ;
Mignani, RP ;
Bignami, GF .
ASTRONOMY & ASTROPHYSICS, 2004, 418 (02) :625-637
[9]   PULSELIKE CHARACTER OF BLACKBODY RADIATION FROM NEUTRON STARS [J].
GREENSTEIN, G ;
HARTKE, GJ .
ASTROPHYSICAL JOURNAL, 1983, 271 (01) :283-293
[10]   A broadband X-ray study of the Geminga pulsar [J].
Halpern, JP ;
Wang, FYH .
ASTROPHYSICAL JOURNAL, 1997, 477 (02) :905-915
123