预览加载中，请您耐心等待几秒...

利用BATC和SDSS数据研究银河系恒星金属丰度分布.docx

预览
1/3
2/3
3/3

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

利用BATC和SDSS数据研究银河系恒星金属丰度分布 Abstract Metallicity,animportantparameterofastar,hassignificanteffectsonitsphysicalandchemicalproperties.Inthisstudy,weinvestigatethemetallicitydistributionofstarsintheMilkyWayusingthedatafromtheBaryonOscillationSpectroscopicSurvey(BOSS)oftheSloanDigitalSkySurvey(SDSS)andtheBeijing-Arizona-Taiwan-Connecticut(BATC)Multi-ColorSkySurvey.Throughspectroscopicmeasurementsandphotometricobservations,weobtainthemetallicitydistributionofstarsinseveralGalacticregions.Ourresultsshowthatthemetallicitydistributionvariesacrossthedifferentregions,withthehighestmetallicityintheGalacticplaneandthelowestintheGalactichalo.OurstudyprovidesimportantinsightsintothechemicalevolutionoftheMilkyWay. Introduction Metallicity,definedastheabundanceofelementsheavierthanheliuminastar,isafundamentalparameterthatdeterminesitsphysicalandchemicalproperties.Themetallicityofastaraffectsitsluminosity,temperature,andspectralcharacteristics.ThemetallicitydistributionofstarsintheMilkyWayprovidesimportantinformationaboutthechemicalevolutionoftheGalaxy,whichisakeyprocessintheformationandevolutionofgalaxies. SeveralstudieshaveinvestigatedthemetallicitydistributionofstarsintheMilkyWayusingvariousmethods,suchasspectroscopicmeasurementsandphotometricobservations.TheBaryonOscillationSpectroscopicSurvey(BOSS)oftheSloanDigitalSkySurvey(SDSS)hasprovidedspectroscopicmeasurementsofmillionsofstarsintheMilkyWay.TheBeijing-Arizona-Taiwan-Connecticut(BATC)Multi-ColorSkySurveyhasconductedphotometricobservationsoftheMilkyWayinmultiplewavebands,providingadditionalinformationonstellarpropertiessuchasmetallicity. Inthisstudy,weusethedatafromtheBOSSandBATCsurveystoinvestigatethemetallicitydistributionofstarsinseveralGalacticregions,includingtheGalacticplane,disk,andhalo.WeaimtoprovideacomprehensiveunderstandingofthemetallicitydistributionintheMilkyWayanditsimplicationsforthechemicalevolutionoftheGalaxy. DataandMethods WeusethedatafromtheBOSSandBATCsurveystoobtainthemetallicitydistributionofstarsintheMi