1997 Fiscal Year Final Research Report Summary
Star forming regions in the Andromeda galaxy
| Project/Area Number |
07640360
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | National Astronomical Observatory |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
VANSEVICIUS Vladas NAO,Opt-IR Div., Invited Prof., 光学赤外線天文学・観測システム研究系, 客員教授
MIYAZAKI Satoshi NAO,ADC,Assic.Prof., 天文機器開発実験センター, 助手 (20290885)
TAKATO Naruhisa NAO,Opt-IR Div., Assis.Prof., 光学赤外線天文学・観測システム研究系, 助手 (50261152)
TAMURA Motohide NAO,Opt-IR Div., Assis.Prof., 光学赤外線天文学・観測システム研究系, 助手 (00260018)
YAMASHITA Takuya NAO,Opt-IR Div., Assoc.Prof., 光学赤外線天文学・観測システム研究系, 助教授 (00211631)
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| Project Period (FY) |
1995 – 1997
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| Keywords | Andromeda galaxy / infrared / star formation / evolved stars |
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| Research Abstract |
The aim of research is to conduct extensive infrared observations of the Andromeda galaxy, the nearest large galaxy accessible from the northern hemisphere, and to reveal the detailed structure of its star forming regions. The observatios are important to study the star formation in the large (galaxy) scale. We have conducted deep and very high resolution imaging of several star forming fields of the galaxy at the wavelengths of 1.25mum (J-band), 1.65 mum (H-band), 2.20 mum (K-band).
After extensive data reduction and analysis, we have successfully detected a number of infrared sources which have never been reported at other wavelengths. We also conducted careful photometry of each infrared source, employing the technique of PSF photometry. The data have been accepted for a publication in the Astrophysical Journal Supplements.
Furthermore, we have discovered new types of objects in the Andromeda galaxy, whose infrared color is high red, presumably considered to be candidates for protostars or super-wind phase AGB stars in the Andromeda galaxy. This kind of objects are unique and detected for the first time in the galaxy. The results have been accepted for a publication in the Astrophysical Journal Letters. These objects will be one of the best targets for the future spectroscopy at the Japanese National Large Telescope under construction.
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