Stability analysis of strange-modes in hot massive stars with time-dependent convection

Sonoi Takafumi; Shibahashi Hiromoto

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Stability analysis of strange-modes in hot massive stars with time-dependent convection

机译：具有时间依赖性对流的热大质量恒星奇特模式的稳定性分析

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Wecarryoutanonadiabaticanalysisofstrange-modesinhotmassivestarswithtime-dependentconvection(TDC).Intheenvelopesofsuchstars,convectiveluminosityisnotsodominantasitisintheenvelopesofstarsonthereddersideoftheclassicalinstabilitystrip.AroundtheFeopacitybump,however,convectioncontributesnonnegligiblytoenergytransfer.Indeed,wefindthattheinstabilityofmodesexcitedattheFebumpislikelytobeweakerwithTDCascomparedwiththecaseofadoptingthefrozen-inconvection(FC)approximation.Butweconfirmthatunstablestrange-modescertainlyremaininhotmassivestarsevenbytakingintoaccountTDC.Wealsoexaminepropertiesofthestrange-modeinstability,whichisrelatedtodestabilizationofstrange-modeswithoutadiabaticcounterparts.Inthistypeofinstability,aphaselagbetweendensityandpressurevariesfrom0?°to180?°inanexcitationzone,unlikethecaseofthe?o-mechanism.Inaddition,weconfirmbycomparingtwomodelswithZ??=??0andZ??=??0.02thatthedominanceofradiationpressureisimportantforthistypeofinstability.

机译：Wecarryoutanonadiabaticanalysisofstrange-modesinhotmassivestarswithtime-dependentconvection（TDC）.Intheenvelopesofsuchstars，convectiveluminosityisnotsodominantasitisintheenvelopesofstarsonthereddersideoftheclassicalinstabilitystrip.AroundtheFeopacitybump，但是，convectioncontributesnonnegligiblytoenergytransfer.Indeed，wefindthattheinstabilityofmodesexcitedattheFebumpislikelytobeweakerwithTDCascomparedwiththecaseofadoptingthefrozen-inconvection（FC）approximation.Butweconfirmthatunstablestrange-modescertainlyremaininhotmassivestarsevenbytakingintoaccountTDC.Wealsoexaminepropertiesofthestrange-modeinstability，whichisrelatedtodestabilizationofstrange-modeswithoutadiabaticcounterparts.Inthistypeofinstability，aphaselagbetweendensityandpressurevariesfrom0？°〜180？°inanexcitationzone另外，我们通过比较两个模型Z = 0 ＝ Z和Z = 0 ＝ 0.02来确定对于这种类型的不稳定性，辐射压力的重要性很重要。

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《PASJ: Publications of the Astronomical Society of Japan》 |2014年第4期|共页
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Sonoi Takafumi; Shibahashi Hiromoto;
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1. Stability analysis of strange-modes in hot massive stars with time-dependent convection [J] . Takafumi SONOI, Hiromoto SHIBAHASHI PASJ: Publications of the Astronomical Society of Japan . 2014,第4期

机译：具有时间依赖性对流的热大质量恒星奇特模式的稳定性分析
2. Nonadiabatic analysis of strange-modes in hot massive stars with time-dependent convection [J] . Takafumi Sonoi, Hiromoto Shibahashi EPJ Web of Conferences . 2015,第2期

机译：具有时间依赖性对流的炽热大质量恒星奇特模式的非绝热分析
3. Sub-surface convection zones in hot massive stars and their observable consequences [J] . M. Cantiello, N. Langer, I. Brott, Astronomy and astrophysics . 2009,第19期

机译：热质量恒星的地下对流区及其可观测的后果
4. Analysis of strange-mode instability with time-dependent convection in hot massive stars [C] . Takafumi Sonoi, Hiromoto Shibahashi International Astronomical Union. . 2014

机译：热烈恒星中与时间依赖性对流的奇怪模式不稳定性分析
5. Non-Boussinesq Stability Analysis of Natural Convection over a Horizontal Hot Plate [D] . Sun, Haotian 2018

机译：水平热板上自然对流的非Boussinesq稳定性分析
6. New Spectrophotometric Method for Quantitative Characterization of Density-Driven Convective Instability [O] . Ying Teng, Pengfei Wang, Lanlan Jiang, 2021

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7. Stability Analysis of Strange-Modes in Hot Massive Stars with Time-Dependent Convection [O] . Sonoi, Takafumi, Shibahashi, Hiromoto 2014

机译：基于maTLaB的热质量恒星奇异模态的稳定性分析时间相关的对流
8. Clue to the Extent of Convective Mixing Inside Massive Stars: The Surface Hydrogen Abundances of Luminous Blue Variables and Hydrogen-Poor Wolf-Rayet Stars [R] . Stothers, R. B. , Chin, C. 1999

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Stability analysis of strange-modes in hot massive stars with time-dependent convection

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