Cold dust in three massive evolved stars in the LMC
Cold dust in three massive evolved stars in the LMC
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LMC 中三颗巨大演化恒星中的冷尘埃
DOI：
10.1051/0004-6361/201014513
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发表时间：
2010
影响因子：
6.5
通讯作者：
Boyer M
中科院分区：
文献类型：
--
作者：
Boyer M
大质量的演化恒星可以产生大量的尘埃，远红外（IR）数据对于确定冷尘埃对总尘埃质量的贡献至关重要。利用Herschel，我们在大麦哲伦星云中的三颗非常尘埃的大质量演化恒星中寻找冷尘埃：R71是一颗明亮的蓝变星，HD 36402是一个Wolf-Rayet三重系统，IRAS 05280 -6910是一颗红超巨星。我们使用辐射传输代码的光谱能量分布模型，发现这三颗恒星的质量损失率高达10- 3 yr-1，这表明高质量的恒星是重要的贡献者的生命周期的尘埃。我们在两个物体中发现了远红外线的过度，但这些过度似乎与ISM和恒星形成区有关。因此，冷尘埃（T< 100 K）可能不是演化恒星尘埃质量的重要贡献者。
Massive evolved stars can produce large amounts of dust, and far-infrared (IR) data are essential for determining the contribution of cold dust to the total dust mass. UsingHerschel, we search for cold dust in three very dusty massive evolved stars in the Large Magellanic Cloud: R71 is a luminous blue variable, HD 36402 is a Wolf-Rayet triple system, and IRAS05280-6910 is a red supergiant. We model the spectral energy distributions using radiative transfer codes and find that these three stars have mass-loss rates up to 10-3yr-1, suggesting that high-mass stars are important contributors to the life-cycle of dust. We found far-IR excesses in two objects, but these excesses appear to be associated with ISM and star-forming regions. Cold dust (T< 100 K) may thus not be an important contributor to the dust masses of evolved stars.