2016 Fiscal Year Final Research Report
Uncovering Starbursts in Nearby Dwarf Galaxies with Integral Field Spectroscopy in Optical
| Project/Area Number |
26800101
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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 | National Astronomical Observatory of Japan (2016)
Kyoto University (2014-2015) |
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Principal Investigator |
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| Research Collaborator |
OHTA Kouji 京都大学, 理学研究科, 教授 (50221825)
NAGAO Tohru 愛媛大学, 宇宙進化研究センター, 教授 (00508450)
KAKAZU Yuko 国立天文台, ハワイ観測所, Subaru Public Outreach Specialist
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 矮小銀河 / スターバースト / 銀河進化 / 可視光 / 面分光 |
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| Outline of Final Research Achievements |
This research projoect aims at searching for low-mass nearby starburst galaxies from present survey data, and at revealing starbursts in dwarf galaxies with wide-field integral-field spectroscopy for them. From spectroscopic archive data of Sloan Digital Sky Survey, we selected two galaxies with the following conditions: (1) the distance is within 200 Mpc, (2) the H-beta equivalent width is larger than 200 A, and (3) there are more than two clumps. We observed them with the Okayama 188-cm reflector telescope and fiber-type optical integral-field spectrograph KOOLS-IFU. The observed line ratios at clumps indicates that not only the brightest clump but also others are low-metal starburst regions. We could not find any evidence of shocked gas nor dynamically disturbed gas.
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| Free Research Field |
銀河物理学
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