The properties of a large sample of OH/IR stars, S stars and C-rich AGB stars
The properties of a large sample of OH/IR stars, S stars and C-rich AGB stars
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DOI：
10.1007/s10509-010-0352-8
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发表时间：
2010-03
影响因子：
1.9
通讯作者：
H. Zhang;Jianjun Zhou;Guo-liang Dong;J. Esimbek;J. Mu
中科院分区：
文献类型：
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作者：
H. Zhang;Jianjun Zhou;Guo-liang Dong;J. Esimbek;J. Mu
我们从文献中收集了 110 颗 OH/IR 星、65 颗 S 星和 184 颗富含 C 星的红外和射电数据。我们分析了它们的光谱能量分布、辐射热强度、红外颜色和质量损失率。我们的研究证实，OH/IR恒星和富含C的恒星在相似的光度下达到了相似的高质量损失率，这支持了质量损失率是由内部恒星活动（例如脉动）而不是其包层特性决定的观点。 OH/IR星和富C星的质量损失率与颜色指数K-[A]、K-[C]、K-[D]和K-[E]密切相关，并且两个星族可以用一个公式描述。我们的研究还表明，只有那些颜色指数 K-[A]<4 或 K-[C]<5 的恒星才具有在近红外波段达到峰值的 SED。
We collected infrared and radio data on 110 OH/IR stars, 65 S stars and 184 C-rich stars from the literature. We analyzed their spectral energy distributions, bolometric magnitudes, infrared colors and mass-loss rates. Our study confirms that OH/IR stars and C-rich stars reach similarly high mass-loss rates at similar luminosities, supporting the idea that mass-loss rates are determined by internal stellar activities such as pulsation rather than the properties of their envelopes. The mass-loss rates of OH/IR stars and C-rich stars are strongly correlated with the color indices K-[A], K-[C], K-[D] and K-[E], and the two populations can be described with one formula. Our study also reveals that only those stars with color indices K-[A]<4 or K-[C]<5 have SEDs that peak in the near-infrared waveband.