仝号的博士后出站报告.ppt

Magnetars windbraking H TongXinjiangAstronomicalObservatory PAC2012 Xiangshan 2 Wherearethey 3 Traditionalmagnetarmodel Magnetar youngNS SNR MSC Bdip BQED 4 4 1013G braking Bmul 1014 1015G burstandsuper Eddingtonluminosityandpersistentemission Magneticdipolebraking ofnormalpulsars Rotationalenergy magneticdipoleradiation particlewind rotation powered Effects higherordermodifications e g brakingindex Michel1969 Manchester1985 XuCamilo 2012 5 IntermittentpulsarsB1931 24 Kramer 2006 Magneticdipolebrakingisonlyapedagogicalmodel Rotatingdipoleinvaccum OnlyasfirstorderapproximationtotherealcaseNormalpulsarsbrakeddownbyarotation poweredparticlewind 7 Existenceofaparticlewindinmagnetars VaryingperiodderivativeHigherleveloftimingnoise comparedwithHBPSRs Magnetism poweredPWNCorrelationbetweenLpwnandLxHigherLpwn Edot 8 PSRJ1622 4950 Levin 2012 9 Rotationalenergylossrate InsummaryMagnetism poweredparticlewindWhenLp Edot amuchlowermagneticfield plushigherordereffects magnetarcase 10 Dipolemagneticfield 1 magneticdipolebraking Polarmagneticfield 11 Dipolemagneticfield 2 windbraking Dipolemagneticfieldinthecaseofwindbraking 12 DipoleB caseI 13 Conclusions 1 Windbraking Wind aidedspindownAlowersurfacedipolefieldMagnetars NS strongmultipolefieldExplainchallengingobservationsofmagnetarsTheirSNeenergiesareofnormalvalueNon detectionofmagnetarsbyFermi LATTheproblemoflow BSGRsTherelationbetweenmagnetarsandHBPSRsAdecreasingPdotduringmagnetaroutburstLowluminositymangetarsmorelikelytohaveradioemissonsTwopredictionsAmagentism poweredPWNAbrakingindexn 3 14 Conclusions 2 subsequentdevelopments Magnetism poweredpulsarwindnebulaaroundSGRSwiftJ1834 9 0846 Younesetal 2012 Geometricaleffectduringwindbraking smallinclinationangle higherB Tong Xu2012 15 Aparadigmshiftinthefuture FAST moreradio loudmagnetars HBPSRs intermittentpulsars Pulsarsareelectromagneticbraking Pulsarsarewindbraking Forshort