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Global Properities of the Interstellar Medium in Nearby Galaxies
https://jaxa.repo.nii.ac.jp/records/36662
https://jaxa.repo.nii.ac.jp/records/366628d3c26ae-fb96-4af8-ac52-a277be58d228
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SA4588013.pdf (306.2 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||
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| 公開日 | 2015-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | Global Properities of the Interstellar Medium in Nearby Galaxies | |||||||||
| 言語 | en | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | departmental bulletin paper | |||||||||
| 著者 |
NEGISHI, Taketoshi
× NEGISHI, Taketoshi
× ONAKA, Takashi
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| 著者所属（英） | ||||||||||
| en | ||||||||||
| Department of Astronomy, School of Science, University of Tokyo | ||||||||||
| 著者所属（英） | ||||||||||
| en | ||||||||||
| D epartment of Astronomy, School of Science, University of Tokyo | ||||||||||
| 出版者 | ||||||||||
| 出版者 | 宇宙科学研究所 | |||||||||
| 出版者（英） | ||||||||||
| 出版者 | Institute of Space and Astronautical Science | |||||||||
| 書誌情報 |
en : The Institute of Space and Astronautical Science report. S.P. : Mid- and Far-Infrared Astronomy and Future Space Mission 巻 14, p. 91-98, 発行日 2000-12 |
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| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | Far-infrared spectra (45-189 μm) of 36 nearby galaxies taken by the Long WavelengthSpectrometer (LWS) aboard the Infrared Space Observatory (ISO) were analyzed to investigatethe general properties of interstellar matter in galaxies. Far-infrared forbidden lines, such as[CII]158 μm, [OI]63 μm, and [NII]122 μm, were detected in most of the sample galaxies. The lineintensities of [CII]158 μm and [NII]122 μm relative to the far-infrared intensity (FIR) decrease asthe far-infrared color becomes bluer, while the ratio of the [OI] intensity to FIR does not showa systematic trend with the color. We estimate the contribution from photodissociation regions(PDRs) to the observed [CII]158 μm intensity, assuming that all the [OI]63 μm and far-infraredcontinuum emission comes from the PDRs. The results indicate that the fraction of [CII]158 μmemission arising from the PDRs ranges from 30% to 80% among the sample galaxies. The rest of theemission is suggested to originate from the extended low-density warm ionized medium (ELDWIM).The derived neutral hydrogen gas density increases as the far-infrared color becomes bluer, beingcompatible with the idea that active galaxies have dense gas in their interstellar medium. Thecontribution from ELDWIM to [CII]158 μm/FIR does not show any systematic trend with thefar-infrared color. The present results suggest that the relation between [CII]158 μm/FIR and thefar-infrared color can be attributed to the decrease in [CII] emission from the PDRs owing to theincrease in collisional de-excitation rather than the decrease in the photoelectric heating efficiency. | |||||||||
| ISSN | ||||||||||
| 収録物識別子タイプ | ISSN | |||||||||
| 収録物識別子 | 0288-433X | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA10455137 | |||||||||
| 資料番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 資料番号: SA4588013000 | |||||||||
