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Titlebook: Angular Momentum and Mass Loss for Hot Stars; L. A. Willson,R. Stalio Book 1990 Kluwer Academic Publishers 1990 Population.Variation.astro

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發(fā)表于 2025-3-21 17:07:09 | 只看該作者 |倒序?yàn)g覽 |閱讀模式
期刊全稱Angular Momentum and Mass Loss for Hot Stars
影響因子2023L. A. Willson,R. Stalio
視頻videohttp://file.papertrans.cn/158/157525/157525.mp4
學(xué)科分類Nato Science Series C:
圖書封面Titlebook: Angular Momentum and Mass Loss for Hot Stars;  L. A. Willson,R. Stalio Book 1990 Kluwer Academic Publishers 1990 Population.Variation.astro
影響因子Fundamental unsolved problems of stellar astrophysics include the effects of angular momentum on stellar structure and evolution, the nature and efficiency of the processes by which angular momentum is redistributed within and lost from stars, and the role that stellar rotation plays in enhancing or driving stellar mass loss. There appears to be a qualitative change in the nature and efficiency of these mechanisms near spectral type FO: hotter (more massive) stars typically retain more angular momentum at least until they reach the main sequence, while cooler stars typically spin down quickly. For the hotter stars, recent work suggests a strong link between the type of pulsation behavior, the mass loss rates, and the rotation velocity. If the same mechanisms are able to drive mass loss from the main sequence A stars, as has recently been proposed, then the current interpretations of a number of observations will be drastically affected: e. g. the ages of clusters may be incorrect by up to a factor of two, and the surface abundances of isotopes of He, Li and Be may no longer give constraints on cosmological nucleosynthesis. There are also effects on the evolution of the abundances o
Pindex Book 1990
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Advances in Science, Technology & Innovationot show a tendency for the amplitudes to grow. Perhaps including time-dependent convection and/or modeling deeper envelopes with additional radiative damping will limit the pulsation amplitudes to observed values.
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發(fā)表于 2025-3-22 00:42:51 | 只看該作者
Advances in Science, Technology & Innovationch may have a sequential evolutionary connection. For the Wolf Rayet stars the Luminous Magnetic Rotator model may be able to explain the long standing “wind momentum problem” as well as the “spin-down problem” associated with earlier rotating wind models. Constraints on the surface magnetic field a
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Pulsation Studies of a 1.8 M⊙ Delta Scuti Modelot show a tendency for the amplitudes to grow. Perhaps including time-dependent convection and/or modeling deeper envelopes with additional radiative damping will limit the pulsation amplitudes to observed values.
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發(fā)表于 2025-3-22 20:55:03 | 只看該作者
Basic Magnetic Rotator Theory with Application to the Angular Momentum Driven Winds of B[e] and Wolfch may have a sequential evolutionary connection. For the Wolf Rayet stars the Luminous Magnetic Rotator model may be able to explain the long standing “wind momentum problem” as well as the “spin-down problem” associated with earlier rotating wind models. Constraints on the surface magnetic field a
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發(fā)表于 2025-3-23 01:04:55 | 只看該作者
Constraints on the Thickness of be Star Disks Derived from Combined IR Excess and Optical Polarimetron envelope, or by having partial cancellation of the equatorial polarization from contributions near the pole. The two solutions have different base densities, .., and may be differentiated by yet other observational data.
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