Infrared spectral observations of late-type stars

晚型恒星的红外光谱观测

• 批准号: 01460010
• 负责人: NOGUCHI Kunio
• 金额: $ 3.39万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01460010/
• 关键词: Late-type stars; Infrared spectral observations; Late stages of stellar evolution; Circumstellar dust; 特異炭素星; S型星

The goal of the project is to examine the late stages of the stellar evolution by observing late-type stars and related astronomical objects in the infrared wavelength region. In this evolutional stages, late-type stars are believed to evolve through asymptotic giant branch stage to protoplanetary nebulae and then to planetary nebulae. In this process, mass loss from stars plays an important role. These stars, therefore, are covered with circumstellar dust envelopes(CDE)which are condenced from lost molecules. These stars are very bright in the infrared wavelength region due to the thermal omission from CDE.Late-type stars are generally classified into three types of stars(0-rich stars, S-type stars, and Carbon stars)depending on the stellar atmospheric composition. Since the composition and characteristics of dust grains in CDE of these three types of stars are different from one another, infrared spectral characteristics for these stars give important information for examining the evolution of three types of stars separately. We carried out both photometric and spectral observations for these stars and have got valuable information on the evolution of late-type stars.

该项目的目的是通过观察红外波长区域中的晚期恒星和相关的天文对象来检查恒星进化的晚期。在这个进化阶段，据信晚期恒星可以通过渐近巨型分支阶段演变为原星云，然后再到行星星云。在此过程中，恒星的质量损失起着重要作用。因此，这些恒星被与丢失分子散布的偶然性灰尘信封（CDE）覆盖。由于CDE的热遗漏，这些恒星在红外波长区域非常明亮。Late-Type恒星通常根据出色的大气组成，分为三种类型的恒星（0磅恒星，S型恒星和碳星）。由于这三种恒星的CDE中尘土颗粒的组成和特性彼此不同，因此这些恒星的红外光谱特征为分别检查三种恒星的演变提供了重要的信息。我们对这些恒星进行了光度和光谱观测，并获得了有关晚期恒星演变的宝贵信息。

项目成果

Kunio Noguchi: "Infrared Spectra of Carbon Stars with SilicateーLike Emission." Publ.Astron.Soc.Japan. 42. 441-457 (1990)

Kunio Noguchi：“具有类硅酸盐发射的碳星的红外光谱。”Publ.Astron.Soc.Japan 42. 441-457 (1990)

K.Noguchi: "Infrared Spectra and Circumstellar Emission of Late-Type Stars III S-Type Stars" Publ.Astron.Soc.Japan. 43. 311-343 (1991)

K.Noguchi：“晚型恒星 III S 型恒星的红外光谱和周星发射”Publ.Astron.Soc.Japan。

Kunio Noguchi: "Infrared Spectra and Circumstellar Emission of LateーType Stars." Publ.Astron.Soc.Japan. 41. 779-807 (1989)

Kunio Noguchi：“晚型恒星的红外光谱和周星发射。”Publ.Astron.Soc.Japan 41. 779-807 (1989)

K.Noguchi: "Statistical Characteristics of the Ten-Micron Silicate Enission in M-Type Stars" Publ.Astron.Soc.Japan. 42. 419-440 (1990)

K.Noguchi：“M 型恒星中十微米硅酸盐辉散的统计特征”Publ.Astron.Soc.Japan。

K. Noguchi, Z. Qian, G. Wang, and J. Wang: ""Infrared Spectra and Circumstellar Emission of IRAS Sources with Ten-Micron Silicate Absorption. "" Publ. Astron. Soc. Japan. (1991)

K.Noguchi、Z.Qian、G.Wang 和 J.Wang：“具有 10 微米硅酸盐吸收的 IRAS 源的红外光谱和星周发射。