Changing Supercycle of the ER UMa-Type Star V1159 Ori

Kato Taichi

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Changing Supercycle of the ER UMa-Type Star V1159 Ori

机译：ER UMa型Star V1159 Ori的超级轮换

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WeexaminedtheVSNETlightcurveoftheERUMa-typestarV1159Ori.Wedetectedalargevariationofthesupercycle(theintervalbetweensuccessivesuperoutbursts)betweenextremesof44.6and53.3d.Theoutburstactivitywasalsofoundtodecreasewhenthesupercyclewaslong.Theobservedvariationofthesupercyclecorrespondstoavariationof$$sim40%$$ofthemass-transferratefromthesecondarystar,totallyunexpectedforthisclassofobjects.Wealsodetectedahintof$$sim1800,mathrm{d}$$periodicityinthevariation,whoseperiodisclosetowhathasbeensuggestedforsolar-typecyclesforcataclysmicvariables(CVs).Ifthisperiodicityiscausedbythemagneticactivityofthesecondarystar,thisdetectionconstitutesthefirstclearevidenceofcontinuingmagneticactivityinCVevolution,evenaftercrossingtheperiodgap.Thisactivitymaypartlyexplainstillpoorlyunderstoodoriginsofthehighmass-transferratesinERUMa-typestars.

机译：WeexaminedtheVSNETlightcurveoftheERUMa-typestarV1159Ori.Wedetectedalargevariationofthesupercycle（theintervalbetweensuccessivesuperoutbursts）betweenextremesof44.6and53.3d.Theoutburstactivitywasalsofoundtodecreasewhenthesupercyclewaslong.Theobservedvariationofthesupercyclecorrespondstoavariationof $$ sim40 ％$$ ofthemass-transferratefromthesecondarystar，totallyunexpectedforthisclassofobjects.Wealsodetectedahintof $$ sim1800，mathrm {d} $$ periodicityinthevariation，whoseperiodisclosetowhathasbeensuggestedforsolar-typecyclesforcataclysmicvariables（CVS）。如果此周期是由次级恒星的磁活动引起的，则该检测将构成C演化过程中连续磁活动的第一个清晰证据，即使跨越该周期间隙也是如此。这种活动可能部分地是由于在ERUMa型恒星中的软质高质量转移率仍未充分理解。

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《PASJ: Publications of the Astronomical Society of Japan》 |2001年第4期|共页
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Kato Taichi;
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7. Changing Supercycle of the ER UMa-Type Star V1159 Ori [O] . Taichi Kato 2001

机译：改变ER UMA型星V1159 ORI的超级循环

Changing Supercycle of the ER UMa-Type Star V1159 Ori

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