2013年脉冲星天文学进习班2013.08.20辐射在脉冲星磁层中的传播效应王陈国家天文台
辐射在脉冲星磁层中的传播效应 国家天文台 王陈 2013年脉冲星天文学讲习班 2013.08.20
Motivation -Circular polarizationSingle sign &Sign reversalWeakand strong2111+46610MHZIntrinsicemissionmechanismOriginPropagation effectBC262PSR1914+13saoiopo(93)0131NdW-900.84PSRO525+211404MHzPSR1451-68649MHZ12(skxuo)180F90oLONGITUDE(DEG)IdeareesLonoitudeLne&Manchester(1988
Motivation – Circular polarization Lyne & Manchester (1988) P.A. • Single sign & Sign reversal • Weak and strong Intrinsic emission mechanism Propagation effect Origin
Motivation -Orthogonal mode emission100O10018090P.A.O10050%LO3.48(ss)saPSR2020+284106Pulses1404MHzLongitudeStinebringetal.(1984)
Motivation - Orthogonal mode emission P.A. Stinebring et al. (1984) V I %L
波模耦回法准2脉冲星磁层中拉第效应旋切上最终偏振点吸辐射的传播效应合状态?發收应传播效应K辐射高度~afew-100sRns初始线偏振BO模：E//k-BplaneX模：EIk-Bplane磁层B-108G-1015G充满相对论流动的ee+等离子体（开放磁力线区域）沿磁层流动N/NGj~10s-1000sy~10s-1000s
• 辐射高度 ~ a few - 100’s RNS . • 初始线偏振 O模： E // k-B plane X模： E ⊥ k-B plane 磁层 • B*=108 G – 1015 G • 充满相对论流动的ee+等离 子体（开放磁力线区域） 沿磁层流动 N/NGJ ~ 10s – 1000s γ ~ 10s – 1000s 最终偏振 状态？ Ω μ k B 传播效应 波 模 耦 合 回 旋 吸 收 准 切 点 效 应 脉冲星磁层中 辐射的传播效应 法 拉 第 效 应
OutlinesPrevious studiesDispersion relation and natural wave modes in pulsarmagnetosphere.SomepropagationeffectsOur worksOn some special propagation effectsVacuumresonance(Wang,Lai&Han2007)Quasi-tangentialeffect(Wang&Lai2009)Wavemodecouplingeffect(Wang,Lai&Han2010)IntrinsicFaradayRotationeffectinpulsarmagnetosphere(Wang,Han&Lai2011)Numerical simulations on Polarization profile changes due toall the propagation effects.(Wang, Lai&Han 2010)Conclusion
Outlines • Previous studies – Dispersion relation and natural wave modes in pulsar magnetosphere. – Some propagation effects • Our works – On some special propagation effects • Vacuum resonance (Wang, Lai & Han 2007) • Quasi-tangential effect (Wang & Lai 2009) • Wave mode coupling effect(Wang, Lai & Han 2010) • Intrinsic Faraday Rotation effect in pulsar magnetosphere (Wang, Han & Lai 2011) – Numerical simulations on Polarization profile changes due to all the propagation effects. (Wang, Lai & Han 2010) Conclusion