论文标题

软件中组件的中红外光谱:在年轻太阳系和彗星中搜索加工材料

Mid-Infrared Spectroscopy of Components in Chondrites: Search for Processed Materials in Young Solar Systems and Comets

论文作者

Morlok, A., Lisse, C. M., Mason, A. B., Bullock, E. S., Grady, M. M.

论文摘要

我们从原始的1-4型软骨中获得了软骨,基质,CAI和散装物质的中红外光谱,以便将它们与幼年,形成太阳系和彗星周围的灰尘材料进行比较。我们的目的是调查我们早期太阳系中的第一个加工材料与目前在其他恒星周围形成的Protoplanetary磁盘之间是否存在相似之处。软骨光谱可以分为两组。 1)在11.3微米和10.0微米的橄榄石特征主导的软骨上。 2)富含中介的软骨在10微米处显示主要特征。散装普通球衣均显示出与两组相似的特征。细粒基质分为三组。 1)在10微米的主带中富含岩石硅酸盐,2)富含橄榄石的带有11.3微米的带和10微米,3)富含辉石。来自Murchison(CM2)的冲击冲击加工矩阵显示了富含Phyllosilicate,无定形和富含橄榄石的材料的特征。天文光谱根据其光谱特征分为四组,无定形(第1组),富含辉石(第2组),富含橄榄石(第3组)和复杂(第4组)。第2组类似于富含Enstatite的细粒料,例如Kakangari(K3)矩阵。第3和第4组可以通过不同浓度的橄榄石和中间质的软骨和细粒基质的结合来解释,但与冲击处理的材料也非常吻合。带比的比较证实了与软骨材料的相似性,例如对于HD100546,而HD142527的内部磁盘没有迹象表明软骨材料的迹象。光谱之间的比较表明原始太阳系材料与偶尔灰尘和彗星之间的一般相似性。

We obtained mid-infrared spectra of chondrules, matrix, CAIs and bulk material from primitive type 1-4 chondrites in order to compare them with the dust material in young, forming solar systems and around comets. Our aim is to investigate whether there are similarities between the first processed materials in our early Solar System and protoplanetary disks currently forming around other stars. Chondrule spectra can be divided into two groups. 1) Chondrules dominated by olivine features at 11.3 micron and 10.0 micron. 2) mesostasis rich chondrules that show main features at 10 micron. Bulk ordinary chondrites show similar features to both groups. Fine-grained matrix is divided into three groups. 1) phyllosilicate-rich with a main band at 10 micron, 2) olivine-rich with bands at 11.3 micron and 10 micron, 3) pyroxene rich. Impact shock processed matrix from Murchison (CM2) shows features from phyllosilicate-rich, amorphous and olivine rich material. Astronomical spectra are divided into four groups based on their spectral characteristics, amorphous (group 1), pyroxene rich (group 2), olivine rich (group 3) and complex (group 4). Group 2 is similar to enstatite-rich fine grained material like e.g. Kakangari (K3) matrix. Group 3 and 4 can be explained by a combination of varying concentrations of olivine and mesostasis rich chondrules and fine grained matrix, but also show very good agreement with shock processed material. Comparison of band ratios confirms the similarity with chondritic material e.g. for HD100546, while the inner disk of HD142527 show no sign of chondrule material. Comparison between spectra indicate a general similarity between primitive solar system materials and circumstellar dust and comets.

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