A multiwavelength study on interstellar chemistry in low-metallicity environments
| Project/Area Number |
15K17612
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Astronomy
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 赤外線天文学 / 電波天文学 / 星間化学 (アストロケミストリー) / 星間分子 / 氷 / マゼラン雲 / 系外銀河 / ホットコア / 星間化学 / 光赤外線天文学 / アストロケミストリー / 星間物質 / 分子 |
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| Outline of Final Research Achievements |
This study aims to reveal the chemical diversity of interstellar medium in the universe. In this project, based on astronomical observations with state-of-the-art telescopes, we investigated properties of interstellar molecules in nearby low-metallicity galaxies, which potentially have common environmental characteristics with past galaxies. Particularly, we focused on understanding of interstellar chemistry in various phases of interstellar medium (molecular gas, ices, and dust), with the aid of multiwavelength observations from infrared to radio. As a result, a number of astrochemically important objects, such as protostars deeply embedded in icy dust with organic molecules and protostars surrounded by a cocoon of warm molecular gas (hot molecular core), were detected outside our Galaxy. Detailed analyses have shown that chemical compositions of interstellar molecules in low-metallicity galaxies have different characteristics compared to those in our Galaxy.
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Report
(4 results)
Research Products
(40 results)
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[Journal Article] Processing of Interstellar Medium as Divulged by Akari2017
Author(s)
Onaka, Takashi; Mori, Tamami I.; Ohsawa, Ryou; Sakon, Itsuki; Bell, Aaron C.; Hammonds, Mark; Shimonishi, Takashi; Ishihara, Daisuke; Kaneda, Hidehiro; Okada, Yoko; Tanaka, Masahiro
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Journal Title
Publications of The Korean Astronomical Society
Volume: 32
Issue: 1
Pages: 77-81
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Spectral Line Survey Toward Quiescent Giant Molecular Clouds in the Large Magellanic Cloud2016
Author(s)
Nishimura Y., Shimonishi, T., Watanabe, Y., Sakai, N., Aikawa, Y., Kawamura, A., Yamamoto, S.
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Journal Title
The Astrophysical Journal
Volume: 818
Issue: 2
Pages: 1-17
DOI
Related Report
Peer Reviewed
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[Journal Article] Concurrent Formation of Carbon and Silicate Dust in Nova V1280 Sco2016
Author(s)
Sakon, I., Sako, S., Onaka, T., Nozawa, T., Kimura, Y., Fujiyoshi, T., Shimonishi, T., Usui, F., Takahashi, H., Ohsawa, R., Arai, A., Uemura, M., Nagayama, T., Koo, B-C., and Kozasa, T.
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Journal Title
The Astrophysical Journal
Volume: 817
Issue: 2
Pages: 145-167
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Systematic Variations in CO2/H2O Ice Abundance Ratios in Nearby Galaxies Found with AKARI Near-Infrared Spectroscopy2015
Author(s)
Yamagishi, M., Kaneda, H., Ishiara, D., Oyabu, S., Onaka, T. Shimonishi, T., and Suzuki, T.
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Journal Title
Astrophysical Journal
Volume: 807
Issue: 1
Pages: 1-7
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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