Spectroscopic Diagnostics of Symbiotic Stars III. Radial Velocity Analyses of HBV 475

[摘要] WepresenthighlyresolvedspectroscopicdataofHBV475(=V1329Cyg)intheopticalregion,whichhavebeenobtainedduringthepast10yearsattheOkayamaAstrophysicalObservatory.WeanalyzedlineprofilesofHα,Hγ,HeIIλ4686,[OIII]λ5007,and[FeVII]λ6086usingGaussiande-convolutionmethod,andinvestigatedthevariationofindividualcomponentsoftheprofilesasafunctionoftheorbitalphase.Werevisedthemassfunctionobtainedfromtheorbitalelementsofthehotstarasfh(M)∼1.2±0.3M⊙.Itdiffersconsiderablyfrompreviouslypublishedvalues,whichwerelargerthan20M⊙.However,ournewmassfunctionismorereasonableforasymbioticsystemconsistingofaredgiantandahotstar,whichiscurrentlypresumedtobeawhitedwarf.Finally,wesuggestadescriptivemodelofline-emittingregionsintheHBV475binary,whichexplainsthebasicvariationinthelineprofilesandagreeswiththemainfeaturesoftheHSTimage.

[学科分类] 天文学(综合)

[关键词] "line profiles";spectroscopy;"stars: binaries";"stars: individual (HBV 475)";"stars: symbiotic"