来自agb恒星的尘埃恒星风的天体物理学

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Journal of the Korean Astronomical Society Pub Date : 2014-12-31 DOI:10.5303/JKAS.2014.47.6.219
K. Suh
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引用次数: 6

摘要

尘埃形成的主要地点被认为是AGB恒星周围的冷包层。几乎所有的AGB恒星都可以被识别为具有大振幅脉动的长周期变星(lpv)。在新形成的尘埃颗粒上强烈的脉动和辐射压力所产生的激波驱动着高质量损失率的尘埃恒星风。AGB恒星的红外观测发现了不同物理条件下的各种尘埃。对气相物质的无线电观测有助于理解恒星风的整体特性。本文对AGB星的分类进行了综述;(ii) AGB星红外双色图;AGB星的脉动;(iv) AGB恒星周围的尘埃,包括星风尘埃;(v) AGB星周围的尘包层;(vi) AGB恒星的质量损失和演化;(vii) AGB尘埃对银河系环境的贡献。我们讨论了各种观测证据及其理论解释。
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ASTROPHYSICS OF DUSTY STELLAR WINDS FROM AGB STARS
The main site of dust formation is believed to be the cool envelopes around AGB stars. Nearly all AGB stars can be identified as long-period variables (LPVs) with large amplitude pulsation. Shock waves produce by the strong pulsation and radiation pressure on newly formed dust grains drive dusty stellar winds with high mass-loss rates. IR observations of AGB stars identify various dust species in different physical conditions. Radio observations of gas phase materials are helpful to understand the overall properties of the stellar winds. In this paper, we review (i) classification of AGB stars; (ii) IR two-color diagrams of AGB stars; (iii) pulsation of AGB stars; (iv) dust around AGB stars including dusty stellar winds; (v) dust envelopes around AGB stars; (vi) mass-loss and evolution of AGB stars; and (vii) contribution of AGB dust to galactic environments. We discuss various observational evidences and their theoretical interpretations.
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来源期刊
Journal of the Korean Astronomical Society
Journal of the Korean Astronomical Society 地学天文-天文与天体物理
CiteScore
1.30
自引率
10.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: JKAS is an international scientific journal publishing papers in all fields of astronomy and astrophysics. All manuscripts are subject to the scrutiny of referees. Manuscripts submitted to JKAS must comply with the ethics policy of JKAS. Six regular issues are published each year on February 28, April 30, June 30, August 31, October 31, and December 31. One year''s issues compose one volume.
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