Orbital Period Studies of Three Algols: TW And, RW Leo, and AY Vul

Shengbang Qian

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Orbital Period Studies of Three Algols: TW And, RW Leo, and AY Vul

机译：TW And，RW Leo和AY Vul三个算法的轨道周期研究

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ThechangesintheorbitalperiodsofthreeEA-typeeclipsingbinaries,TWAnd,RWLeo,andAYVul,arediscussedbasedonananalysisoftheir$$O-C$$curves.ForRWLeo,itsorbitalperiodwasrevisedand,assumingacyclicoscillationintheorbitalperiod,aperiodof38.4a€‰yrwasdetermined.Fortheothertwosystems,TWAndandAYVul,their$$O-C$$diagramsshowcomplexvariations.Undertheassumptionofperiodicoscillation,cyclicchangeswithperiodsof56.4and78.6a€‰yrwerediscoveredtosuperimposeonupwardparabolicchanges,indicatingasecularperiodincrease.Thesecularperiodincreasesforthetwobinarysystemsindicatethattheyareonanactivephaseofmasstransfer.Assumingtheoscillationsintheperiodstobecausedbylight-timeeffectsduetothepresenceofa€?thirdbodiesa€?rotatingaroundthesebinarystars,theorbitalparametersofthethirdbodiesweredetermined.ForRWLeo,itispossibletodetectanadditionalthirdbodyphotometricallyandspectroscopically.However,fortheothertwosystems,TWAndandAYVul,itislesslikelytoseeadditionalbodies,unlesstheorbitalinclinationisverysmall(i.e.,$$i^{prime}30^{circ}$$).Newphotometricandspectroscopicobservationsandacarefulanalysisofthosedataareneededtocheckthepresenceofthirdbodies.

机译：ThechangesintheorbitalperiodsofthreeEA-typeeclipsingbinaries，TWAnd，RWLeo，andAYVul，arediscussedbasedonananalysisoftheir $$ OC $$ curves.ForRWLeo，itsorbitalperiodwasrevisedand，assumingacyclicoscillationintheorbitalperiod，aperiodof38.4a€‰yrwasdetermined.Fortheothertwosystems，TWAndandAYVul，他们$$ OC $$ diagramsshowcomplexvariations.Undertheassumptionofperiodicoscillation，cyclicchangeswithperiodsof56.4and78.6a €‰yrwerediscoveredtosuperimposeonupwardparabolicchanges，indicatingasecularperiodincrease.Thesecularperiodincreasesforthetwobinarysystemsindicatethattheyareonanactivephaseofmasstransfer.Assumingtheoscillationsintheperiodstobecausedbylight-timeeffectsduetothepresenceofa€thirdbodiesa€rotatingaroundthesebinarystars，theorbitalparametersofthethirdbodiesweredetermined.ForRWLeo，itispossibletodetectanadditionalthirdbodyphotometricallyandspectroscopically.However，fortheothertwosystems，TWAndandAYVul，itislesslikelytoseeadditionalbodies，unlesstheorbitalinclinationisverysmall（即，$$ I ^ {}素LT;？30 ^ {CI rc} $$）。新的光度法和分光镜观察以及对这些数据的仔细分析，有助于检查第三主体的存在。

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《PASJ: Publications of the Astronomical Society of Japan》 |2003年第1期|共页
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Shengbang Qian;
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1. Orbital Period Studies of Three Algols: TW And, RW Leo, and AY Vul [J] . Shengbang Qian PASJ: Publications of the Astronomical Society of Japan . 2003,第1期

机译：TW And，RW Leo和AY Vul三个算法的轨道周期研究
2. Period studies of classical Algol-type binaries II: UX Leo, RW Mon, EQ Ori, XZ UMa and AX Vul [J] . Soydugan F., Erdem A., Do?ru S.S., New astronomy . 2011,第4期

机译：经典Algol型二进制文件II的周期研究：UX Leo，RW Mon，EQ Ori，XZ UMa和AX Vul
3. Orbital period variations of four Algol-type eclipsing binaries: SW Cyg, UU Leo, XX Cep and BO Vul [J] . Erdem A, Dogru SS, Bakis V, Astronomische Nachrichten: A Journal on all Fields of Astronomy . 2007,第6期

机译：四种Algol型日食双星的轨道周期变化：SW Cyg，UU Leo，XX Cep和BO Vul
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机译：三个身体效应在两个AlGOL二进制文件的时期变化：V342 AQL和TW LAC
5. Numerical Simulations of Direct Impact Accretion Processes in Short Period Algol Type Binaries [D] . Silver, Isaac Morgan 2013

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6. Shifting Milestones of Natural Sciences: The Ancient Egyptian Discovery of Algol’s Period Confirmed [O] . Lauri Jetsu, Sebastian Porceddu 2010

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7. Orbital Period Changes and Their Explanations in Two Algol Binaries: WY Per and RW Leo [O] . Wen-Ping, Liao, Sheng-Bang, Qian 2010

机译：两个algol二元的轨道周期变化及其解释：WY per和RW Leo
8. On the orbital period of algol system [R] . Chou, K. C. 1965

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Orbital Period Studies of Three Algols: TW And, RW Leo, and AY Vul

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