23341.雙星中磁場存在與非同步轉動的研究

1、中國科學院研究生院碩士學位論文雙星中磁場存在與非同步轉動的研究姓名：張瑞玉申請學位級別：碩士專業(yè)：天體物理指導教師：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