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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Discovery of Extremely Large-Amplitude Quasi-Periodic Photometric Variability in a WC9-Type Wolfa€“Rayet Binary, WR 104
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Discovery of Extremely Large-Amplitude Quasi-Periodic Photometric Variability in a WC9-Type Wolfa€“Rayet Binary, WR 104

机译：在WC9型Wolfa“ Rayet Binary，WR 104”中发现超大幅度准周期性光度可变性

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WediscoveredthattheWolfa€“Rayet(WR)$$+$$OBstarbinaryWR104,renownedforitsassociateda€?dustypinwheelnebulaa€?,recentlyspatiallyresolvedwithinfraredinterferometry,exhibitsstrongquasi-periodicopticalvariationswithafullamplitudeof2.7a€‰mag.Suchalarge-amplitude,continuousvariationhasbeenunprecedentedinaWRstar.Theopticalquasi-period($$sim241,mathrm{d}$$)isinalmostperfectagreementwiththeinterferometricperiod($$243.5pm3,mathrm{d}$$).Theremarkableagreementofthedominantperiodinopticalvariabilitywiththeorbitalperiodsupportsthatthestronglyvaryingdustobscurationisphysicallyrelatedtothebinarymotion,ratherthansporadicdust-formingepisodes.Consideringtheloworbitalinclination($$11^{circ}pm7^{circ}$$)andthenearlycircularorbitinferredfromtheinterferometricobservations,thestronglyvariableline-of-sightextinctionsuggeststhatthehighlystructuredextinctionmightbeintheprocessofbeingformedviatheejectionofdustinthedirectionofthebinaryrotationaxis.Anotherviableexplanationisthatthethree-dimensionalstructureoftheshockfront,itself,istheobscuringbody.Dependingonthegeometry,thedustyshockfrontneartheconjunctionphaseofthebinarycancompletelyobscuretheinnerWR-starwindandtheOBstar,whichcanexplaintheamplitudeoftheopticalfadingandthepastobservationofremarkablespectralvariation.
机译：我们发现Wolfa“ Rayet（WR）$$ + $ OBstarbinaryWR104，因其与“尘土飞车星云”相关联而闻名，最近在空间上用红外干涉仪解决了这一问题，它显示出准星度的准周期性光学变率，其最大似然度为2.7，最大的WR近似为（连续）241。 $$）isinalmostperfectagreementwiththeinterferometricperiod（$$ 243.5pm3，mathrm {d} $$）。Theremarkableagreementofthedominantperiodinopticalvariabilitywiththeorbitalperiodsupportsthatthestronglyvaryingdustobscurationisphysicallyrelatedtothebinarymotion，ratherthansporadicdust-formingepisodes.Consideringtheloworbitalinclination（$$ 11 ^ {} CIRC PM7 ^ {} CIRC $$）andthenearlycircularorbitinferredfromtheinterferometricobservations，thestronglyvariableline-的-sightextinctionsuggeststhatthehighlystructuredextinctionmightbeintheprocessofbeingformedviatheejectionofdustinthedirectionofthebinaryrotationaxis.Anotherviableexplanationisthatthethree-dimensionalstructureoftheshock根据几何形状，二元相结合相附近的尘埃冲击波可以完全掩盖WR-starwind和OBstar，这可以解释光学衰落的幅度和可观察到的明显光谱变化。

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