Fluorescence of SiO Condensate in Near Infrared Region

SiO凝聚体在近红外区的荧光

• 批准号: 04804009
• 负责人: WADA Setsuko
• 金额: $ 1.22万
• 依托单位: Univ.of Electro-Communications
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04804009/
• 关键词: Fluorescence; Extended Red Emission; Reflection Nebula; Interstellar Dust; Amorphous Material; Silicon Mono-oxide; ケイ酸質の塵; 赤外線スペクトル; 10μ吸収ピーク; クラスタ; 急冷固体

In reflection nebulae, extended red excess emission(ERE)are observed. The emission is come from the dust irradiated with emission of a central star. Authors proposed the emission can be caused by the carbonaceous dust alike quenched carvonaceous composite(QCC, ApJ1992). A dust, which has Si-O network structure, may exit in reflection nebulae. In this work, we measured fluorescence spectra of SiO condensates and discussed contribution of the SiO fluorescence to the ERE.We made three kinds of SiO condensate materials ; (1) SiO condensate which was made as a deposit from SiO gas, (2) oxidize SiO condensate which was made with an exposure of the SiO condensate to air, (3) thermally altered SiO condensate which was made with heating of the SiO condensate to 650 C in vacuum.We measured fluorescence spectra of the SiO condensate materials with two spectroscopy systems ; in one system, Ar laser (488.4 nm, 2mW)is used for excitation and two kinds of dectors, Si detector (500-1000 nm)and Ge detector(750-1500 nm), are used for detection and in the other system, Hg-Xe lamp (313nm)is used for excitation and two kinds of dectors, photo-multiplier (R666 and R376, 400-800 nm)and Ge detector (750-1500 nm), are used for detection.In both fluorescence measurements of untreated SiO condensate and thermally altered SiO condensate, we did not detect obvious emission. In the measurement of oxidized SiO condensate weak yellow emission with a peak wavelength at 480-550 nm was detected with using the photo-multipliers.According to our measurement, the "SiO condensate dust" cannot be a candidate of the ERE emitter in the reflection nebulae.

在反射星云中，观察到延长的红色过量发射（ERE）。发射来自中心恒星发射辐射照射的尘埃。作者提出排放可能是由碳质粉尘类似的淬灭的肉质复合材料引起的（QCC，ApJ1992）。反射星云中可能存在具有Si-O网络结构的尘埃。在这项工作中，我们测量了SiO2凝聚体的荧光光谱，并讨论了SiO2荧光对ERE的贡献。我们制作了三种SiO2凝聚体材料； (1)由SiO2气体沉积而成的SiO2冷凝物，(2)通过将SiO2冷凝物暴露于空气而形成的氧化SiO2冷凝物，(3)通过加热SiO2冷凝物而形成的热变性SiO2冷凝物在真空中温度达到650℃。我们用两个光谱系统测量了SiO凝聚材料的荧光光谱；在一个系统中，使用Ar激光器（488.4 nm，2mW）进行激发，并使用两种探测器，Si探测器（500-1000 nm）和Ge探测器（750-1500 nm）进行探测，在另一系统中， Hg-Xe灯（313nm）用于激发和两种探测器，光电倍增管（R666和R376，400-800 nm）和Ge探测器（750-1500 nm）进行检测。在未处理的SiO凝聚物和热变的SiO凝聚物的荧光测量中，我们没有检测到明显的发射。在氧化 SiO 凝聚物的测量中，使用光电倍增管检测到峰值波长为 480-550 nm 的弱黄色发射。根据我们的测量，“SiO 凝聚物灰尘”不可能是反射中 ERE 发射体的候选者。星云。

项目成果

A.Sakata,S.Wada,T.Narisawa,Y.Asano,Y.IIjima,T.Onaka,and A.T.Tokunaga: "Quenched Carbonaceous Composite.Fluorescence Spectrum Compared to the Extended Red Emission Observed in Reflection Nebulae." Astrophys.J.(Letters). 393. L83-L86 (1992)

A.Sakata、S.Wada、T.Narisawa、Y.Asano、Y.IIjima、T.Onaka 和 A.T.Tokunaga：“淬火碳质复合材料。荧光光谱与反射星云中观察到的扩展红色发射的比较。”

A.Sakata,S.Wada,A.T.Tokunaga,T.Narisawa,H.Nakagawa,and H.Ono: "Ultraviolet Spectra of Quenched Carbonaceous Composite Derivatives:Comparison to the“217^1 nm"Interstellar Absorption Feature" Astrophysical Journal. 430(in press). (1994)

A. Sakata、S. Wada、A. T. Tokunaga、T. Narisawa、H. Nakakawa 和 H. Ono：“淬火碳质复合衍生物的紫外光谱：与“217^1 nm”星际吸收特征的比较”《天体物理学杂志》430。 （正在出版）（1994）。

A.Sakata,S.Wada,A.T.Tokunaga,T.Narisawa,H.Nakagawa,and H.Ono: "Ultraviolet Spectra of Quenched Carbonaceous Composite Derivatives:Comparison to the “217nm"Interstellar Absorption Feature" Astrophysical Journal. 430(in press). (1994)

A. Sakata、S. Wada、A. T. Tokunaga、T. Narisawa、H. Nakakawa 和 H. Ono：“淬火碳质复合衍生物的紫外光谱：与“217nm”星际吸收特征的比较”《天体物理学杂志》430（出版中）。 ）（1994）。

A.Sakata, S.Wada, A.T.Tokumaga, T.Narisawa, H.Nakagawa, and H.Ono: ""Ultraviolet Spectra of Quenched Carbonaceous Composite Derivatives : Comparison to the "217 nm" Interstellar Absorption Feature."" Astrophys.J.430(in press). (1994)

A.Sakata、S.Wada、A.T.Tokumaga、T.Narisawa、H.Nakakawa 和 H.Ono：“淬火碳质复合衍生物的紫外光谱：与“217 nm”星际吸收特征的比较。”Astrophys.J