NAOC Open IR  > 光学天文研究部
Modelling the astronomical silicate features - I. On the spectrum subtraction method
Li, AG; Greenberg, JM; Zhao, G
2002-08-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号334期号:4页码:840-846
摘要The assumption of additive absorptivity by different components in compound particles is a widely used method applied in the literature to the analysis of the chemical and structural properties of astronomical (circumstellar, interstellar, protostellar and cometary) silicates as well as other materials. The errors intrinsic in this additivity assumption, which, in application to astronomical spectra, amounts in some cases to spectrum subtraction, have not always been adequately considered in previous works on silicate mineralogy. The failings in the 'spectrum subtraction method' (intrinsically the same as the additive absorptivity assumption) are discussed here in terms of silicate core-ice mantle grains with various shapes. It is shown that these assumptions result in substantial errors for spherical grains. For spheroidal grains, the errors are less significant and the spectrum subtraction method can be used to remove the ice mantle effects. It is demonstrated that there is no significant improvement by considering a distribution of spheroidal shapes. It is further shown that the presence of additional organic mantles substantially modifies the silicate mineralogy interpretation.
关键词Scattering Ism : Lines And bAnds Dust Infrared : Ism Extinction
收录类别SCI
语种英语
WOS记录号WOS:000177589800013
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8535
专题光学天文研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Princeton Univ Observ, Princeton, NJ 08544 USA
3.Univ Arizona, Theoret Astrophys Program, Tucson, AZ 85719 USA
4.Leiden Univ, Raymond & Beverly Sackler Lab Astrophys, NL-2300 RA Leiden, Netherlands
推荐引用方式
GB/T 7714
Li, AG,Greenberg, JM,Zhao, G. Modelling the astronomical silicate features - I. On the spectrum subtraction method[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2002,334(4):840-846.
APA Li, AG,Greenberg, JM,&Zhao, G.(2002).Modelling the astronomical silicate features - I. On the spectrum subtraction method.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,334(4),840-846.
MLA Li, AG,et al."Modelling the astronomical silicate features - I. On the spectrum subtraction method".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 334.4(2002):840-846.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Li, AG]的文章
[Greenberg, JM]的文章
[Zhao, G]的文章
百度学术
百度学术中相似的文章
[Li, AG]的文章
[Greenberg, JM]的文章
[Zhao, G]的文章
必应学术
必应学术中相似的文章
[Li, AG]的文章
[Greenberg, JM]的文章
[Zhao, G]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。