Modeling the astronomical silicate mineralogy: On the effects of grain temperature
文献类型：期刊论文
| 作者 | Li, MP; Zhao, G ; Li, AG
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2004-10-01 |
| 卷号 | 613期号:2页码:L145-L148 |
| 关键词 | comets : individual (C/2002 V1 (NEAT) dust, extinction infrared : ISM infrared : solar system radiation mechanisms : thermal |
| 英文摘要 | The mineralogical composition of dust contains important information regarding the origin and processing of the dust and the physical, chemical, and evolutionary properties of the astrophysical environment where the dust is found. In the literature, the composition of cosmic dust is usually inferred by fitting the observed infrared (IR) emission spectrum with a sum of emission spectra calculated from various individual grain species of different sizes but assuming a single, identical temperature for them. However, we show in this work that these grains of different compositions and/or different sizes, while in thermal equilibrium with the radiation field to which the grains are exposed, achieve different temperatures. The effects of dust temperature on dust compositional studies are demonstrated by showing that the IR emission spectrum calculated from a mixture of grains emitting at different temperatures differs substantially from that of the same grain mixture but with a single, identical temperature. Therefore, the need for obtaining realistic temperatures from realistic cosmic dust analogs is a key to properly interpreting the observational IR emission spectra, e.g., the rich set of data that the Spitzer Space Telescope has been collecting. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000224303300016 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6932]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ China, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Arizona, Lunar & Planetary Lab, Theoret Astrophys Program, Tucson, AZ 85721 USA 4.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA 5.Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA |
| 推荐引用方式 GB/T 7714 | Li, MP,Zhao, G,Li, AG. Modeling the astronomical silicate mineralogy: On the effects of grain temperature[J]. ASTROPHYSICAL JOURNAL,2004,613(2):L145-L148. |
| APA | Li, MP,Zhao, G,&Li, AG.(2004).Modeling the astronomical silicate mineralogy: On the effects of grain temperature.ASTROPHYSICAL JOURNAL,613(2),L145-L148. |
| MLA | Li, MP,et al."Modeling the astronomical silicate mineralogy: On the effects of grain temperature".ASTROPHYSICAL JOURNAL 613.2(2004):L145-L148. |
入库方式： OAI收割
来源：国家天文台
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