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Structure of interstellar carbonaceous dusts and their surface.

Structure of interstellar carbonaceous dusts and their surface.
星际碳质尘埃的结构及其表面。
批准号:
09640314
负责人:
WADA Setsuko
金额:
$1.66万
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (C)
财政年份:
1997
资助国家:
日本
项目状态:
已结题
起止时间:
1997 至 1998

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中文摘要
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英文摘要
Quenched Carbonaceous Composite (QCC) is a carbonaceous material condensed from an ejecta of hydrocarbon plasma. A.Sakata and his colleagues have shown that QCC has a 220 nm absorption feature, a set of infrared absorption bands that correspond to the infrared emission features in reflection nebulae, HIT regions, and planetary nebulae, and exhibits visible fluorescence matching the extended red emission seen in reflection nebulae. These properties make Q CC a strong candidate material as a laboratory analog to the carbonaceous material in the interstellar medium.High-resolution transmission electron micrographs (HRTEM) revealed that the dark-QCC is a coagulation of carbonaceous onion-like particles. Each particle consists of multiple shells, and many of the particles have a void at the center. The HRTEM images implied that the particles have many defected sites in their structure.By exposuring of the QCC with hydrogen gas, the defected sites in the dark-QCC particles were reacted with hydrogen molecules easily. As a result, peak intensities of infrared absorption bands at 3.42, 3.51, 6.9, 7.3, 12.5mum were increased, However, the 220 nm absorbance peak of the dark-QCC was stable. On the other hands, the filmy-QCC did not react with hydrogen both under irradiation of uv (222nm) and under dark condition.In order to clarify molecular cloud chemistry, we need more studies about the surface of the candidate materials.
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作者: []
通讯作者:
Wada S., Kaito C.et al.: "Carbonaceous onion-like particles as a component of interstellar dust" Astron.& Astrophys.(in press). (1999)
Wada S.、Kaito C.等人:“作为星际尘埃成分的碳洋葱状颗粒”Astron。
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Study of Chemical Processing of Carbonaceous Dust
  • 批准号:
    14540224
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 资助金额:
    $2.37万
  • 财政年份:
    2002
  • 负责人:
    WADA Setsuko
  • 依托单位:
Research for the origin of an interstellar 220 nm bump
  • 批准号:
    11440063
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 资助金额:
    $9.02万
  • 财政年份:
    1999
  • 负责人:
    WADA Setsuko
  • 依托单位:
Infrared absorption band at 7 mum of protostar dusts- An explanation with magnesium
  • 批准号:
    07804014
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 资助金额:
    $1.22万
  • 财政年份:
    1995
  • 负责人:
    WADA Setsuko
  • 依托单位:
Fluorescence of SiO Condensate in Near Infrared Region
  • 批准号:
    04804009
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 资助金额:
    $1.22万
  • 财政年份:
    1992
  • 负责人:
    WADA Setsuko
  • 依托单位:
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