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题名: Oscillations of long-period variables
作者: Xiong DaRun(熊大闰); Deng, L; Cheng, L; Deubner, FL; ChristensenDalsgaard, J; Kurtz, D
刊名: NEW EYES TO SEE INSIDE THE SUN AND STARS
出版日期: 1998
卷号: 0, 期号:185, 页码:399-400
学科分类: Astronomy & Astrophysics
文章类型: Article
英文摘要: We have performed a linear pulsational stability survey of long period variable models. The dynamic and thermodynamic couplings between convection and oscillations are treated by using a statistical theory of nonlocal and time-dependent convection. The results show that the fundamental and all the low overtones are always pulsationally unstable for the low-temperature models when the coupling between convection and oscillations is ignored. When the coupling is considered, there is indeed a "Mira" pulsationally instability region outside of the Cepheid instability strip on the H-R diagram. The coolest models near the Hayashi track are pulsationally stable. Towards high temperature the fundamental mode first becomes unstable, and then the first overtone. Some of the 2nd -4th overtones may become unstable for the hotter models. All the modes higher than 4th (n > 4) are pulsationally stable. The position and the width of such an instability region on the H-R diagram critically depends on the mass, luminosity and metal abundance of the star.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
收录类别: ISTP ; SCI
语种: 英语
WOS记录号: WOS:000078932400090
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/11185
Appears in Collections:熊大闰_期刊论文

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作者单位: 1.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Beijing Astron Observ, Beijing 100080, Peoples R China

Recommended Citation:
Xiong, DR; Deng, L; Cheng, L.Oscillations of long-period variables,NEW EYES TO SEE INSIDE THE SUN AND STARS: PUSHING THE LIMITS OF HELIO- AND ASTEROSEISMOLOGY WITH NEW OBSERVATIONS FROM THE GROUND AND FROM SPACE,1998,0 (185):399—400
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文件名: 1998067Oscillations of long-period variables.pdf
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