预览加载中，请您耐心等待几秒...

Blazar多波段有效谱指数关系研究.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

Blazar多波段有效谱指数关系研究 Blazarisatypeofactivegalacticnuclei(AGN),whichisahighlyvariableanddistantsourceofgammarays.ItisbelievedthatBlazarsemitelectromagneticradiationacrosstheentireelectromagneticspectrum,includingradiowaves,infraredlight,visiblelight,ultravioletlight,X-rays,andgammarays.Thespectralenergydistribution(SED)ofBlazarsischaracterizedbytheshapeofthespectralindex.Inthispaper,wewilldiscussthemulti-wavelengtheffectivespectralindexrelationinBlazar. Themulti-wavelengtheffectivespectralindexisanessentialparameterthatdescribestheshapeofthespectralenergydistributionofBlazar.Theeffectivespectralindexisdefinedastheslopeofthelogarithmicfluxdensityversusfrequencyplot.Theeffectivespectralindexvarieswiththefrequencybandandthetimescaleofobservation.Themulti-wavelengtheffectivespectralindexrelationisanempiricalrelationthatconnectstheeffectivespectralindicesatdifferentfrequencybands. Studieshaveshownthatthemulti-wavelengtheffectivespectralindexrelationinBlazarisapowerlawfunction.Therelationcanbeexpressedasα(ν1,ν2)=α0+klog(ν1/ν2),whereα(ν1,ν2)istheeffectivespectralindexbetweenfrequencybandsν1andν2,α0istheintercept,andkistheslopeofthepowerlawfunction.Themulti-wavelengtheffectivespectralindexrelationiswidelyusedintheanalysisofBlazardata,asitprovidesawaytoinferthephysicalprocessesthatproducetheobservedemission. TheeffectivespectralindexinBlazarisaffectedbyseveralphysicalprocesses,includingsynchrotronemission,inverseComptonscattering,andabsorption.Synchrotronemissionisaprocessthatproducesradiationwhenchargedparticlesareacceleratedinmagneticfields.InverseComptonscatteringisaprocessinwhichalow-energyphotonisboostedtoahigherenergybycollidingwithahigh-energyelectron.Absorptionisaprocessinwhichradiationisabsorbedbyinterveningmaterial,suchasinterstellargasanddust. Themulti-wavelengtheffectivespectralindexrelationinBlazarcanprovideinsightsintothephysicsoftheemissionandtheenvironmentoftheBlazar.Forexample,theslopeoftheeffectivespectralindexrelationcanbeusedtodistinguishbetweendifferentemis