23341.雙星中磁場存在與非同步轉(zhuǎn)動(dòng)的研究

1、中國科學(xué)院研究生院碩士學(xué)位論文雙星中磁場存在與非同步轉(zhuǎn)動(dòng)的研究姓名：張瑞玉申請學(xué)位級別：碩士專業(yè)：天體物理指導(dǎo)教師：李焱201205AbstractTherearealotofphysicalprocessesinthebinarysystemsduringtheevo—lutionMallyprocesseshaⅣeinfluellceout11erotationofthecomponeIltstowardsynchronizatio

2、nornon—synchronizationInthecaseofsynchronousrotation，theinteriorofthecomponentsrotatesrigidlvItexists：hence，diHerentialrotationinthecomponentsonlyduringtheasynchronousrotationofthesystemsAccordingtotheTayler—Spruitdynamo

3、，thegenerationofmagnetic丘eldsinstarsareduetotheexistenceofdiHbreIltialrotationTherefbre，theexistenceofmagnetic矗eldsinbinarysystemsiscloselyrelatedtotheasynchronousrotationAmethodcon—sideringtheactionsofmaIlyp11ysicalproc

4、essessimultaneouslyisproposedheretocalculatethespinandorbitalperiodsinbinarysystems，whichincludema_ssexchange，stellarwindandmassover丑ow矗omouterLagran舀anpointBythismethodwecangetwhetherthebinaryisinsynchronizationduringev

5、olutionTheresultsofdetailedcomputationswiththismethodindicatethatthespinandorbitperiodscanbereachednearsynchronizationinashorttime，butittakeslongtimeteachcompletelysynchronizationifthesystemhavereachedsynchronousrotation

6、，steUarwindandv01umechangecasedbyev01utionhaⅣelittlein丑uenceonsynchronizationduringmainsequenceAsmassexchangestarted，thesynchronizationrotationcanbechangedintonon—synchronizationrotationforsemi—detachedbinariesThereexist

7、，therefore，differentialrotationsandmagnetic6eldsinthecomponentsHowever，thedegreeofaSyncllronousisdi圩erentfortheprimaryandsecondauryItmeansthatthestrengthofdiffe卜entialrotationandmagnetic丘eldmaybedi＆rentinbothofthecompone

8、ntsF0rcontactbin壯ysystems：tidaleHectaresostrongthatmassexchangecannotcaSeobviousaSynchronousrotationTheevolutiontracksinHRdiagramofsynchronizationandnon—synchronizationarealsoconlparedwitheachother，theresultshowthatthemo