Evolution of effective dust extinction law of galaxies and its observational examination

星系有效尘埃消光定律的演化及其观测检验

• 批准号: 19740108
• 负责人: INOUE akio
• 金额: $ 2.03万
• 依托单位: Osaka Sangyo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19740108/
• 关键词: 宇宙塵(ダスト); 輻射輸送; 銀河進化; 銀河間空間; 原始惑星系円盤; 宇宙再電離; 理論天文学; ダスト; 光電効果; モンテカルロ法; 化学進化; 原始惑星円盤; 氷ダスト

Rapid developments of multi-wavelength electro-magnetic radiation observations by state-of-the-art instruments like Subaru telescope requested radiation transfer calculations to model spectra of various celestial objects. In particular, spectra of galaxies are suffering from extinction by cosmic dust which exists in the interstellar medium in galaxies. The main objectives of this research project were to obtain an effective dust extinction law to correct the spectra for the dust extinction and to obtain an evolution of the extinction law along galaxy evolution. However, unfortunately, I never reached these main goals because of a difficulty in the size distribution of dust grains. On the other hand, a newly developed galaxy evolution model and development and application of a general purpose code for radiation transfer enabled me to achieve the following four outcomes: (1) revealing mechanism to determine dust content in galaxies, (2) derivation of the photo-electric heating rate by intergalactic dust, (3) proposing a new spectral model of galaxies taking into account ionizing photon transfer in galaxies and intergalactic medium, and (4) revealing effects of scattering on structure of proto-planetary disks and proposing a technique to search icy dust by using a scattering spectral model.

通过斯巴鲁望远镜等最先进的仪器进行多波长电磁辐射观测的快速发展需要辐射传输计算来模拟各种天体的光谱。特别是，星系的光谱正遭受星系星际介质中存在的宇宙尘埃的消光。该研究项目的主要目标是获得有效的尘埃消光定律来校正尘埃消光的光谱，并获得消光定律随星系演化的演化。然而，不幸的是，由于尘埃颗粒尺寸分布的困难，我从未实现这些主要目标。另一方面，新开发的星系演化模型以及辐射传输通用代码的开发和应用使我取得了以下四个成果：（1）揭示了确定星系中尘埃含量的机制，（2）推导了星系间尘埃的光电加热速率，（3）提出了一种新的星系光谱模型，考虑了星系和星系间介质中的电离光子转移，（4）揭示了散射对星系间结构的影响原行星盘并提出了一种利用散射光谱模型搜索冰尘的技术。

项目成果

原始惑星系円盤における輻射輸送数値計算コードの開発

原行星盘辐射输运数值计算代码的开发

• 发表时间: 2007
• 作者: 井上昭雄;中本泰史
• 通讯作者: 中本泰史

The escape fraction of ionizing photons from galaxies at z=0-6

z=0-6 处星系中电离光子的逃逸分数

• 发表时间: 2007
• 作者: Inoue A. K.;et. al.
• 通讯作者: et. al.

Lyman 'bump' galaxies-II.A possible signature of massive extremely metal-poor or metal-free stars in z=3.1 Ly α emitters

莱曼“凹凸”星系-II。 z=3.1 Ly α 发射体中大质量极度贫金属或无金属恒星的可能特征

• 发表时间: 2011
• 期刊: Monthly Notices of the Royal Astronomical Societ
• 作者: Inoue;A.K.;et al.
• 通讯作者: et al.

静的原始惑星系円盤における鉛直方向の温度構造に対する散乱の影響

散射对静态原行星盘垂直温度结构的影响

• 发表时间: 2008
• 作者: 井上昭雄;岡明憲;中本泰史
• 通讯作者: 中本泰史

PRE-TRANSITIONAL DISK NATURE OF THE AB Aur DISK

• DOI: 10.1088/2041-8205/718/2/l199
• 发表时间: 2010-07
• 期刊: The Astrophysical Journal Letters
• 作者: M. Honda;A. Inoue;Y. Okamoto;H. Kataza;M. Fukagawa;T. Yamashita;T. Fujiyoshi;M. Tamura;J. Hashimoto;T. Miyata;S. Sako;I. Sakon;H. Fujiwara;T. Kamizuka;T. Onaka