Star forming regions in the Andromeda galaxy

仙女座星系中的恒星形成区域

• 批准号: 07640360
• 负责人: KODAIRA Keiichi
• 金额: $ 1.34万
• 依托单位: National Astronomical Observatory
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07640360/
• 关键词: Andromeda galaxy; infrared; star formation; evolved stars

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.

研究的目的是对仙女座星系进行广泛的红外观测，这是可以从北半球访问最近的大型星系，并揭示其恒星形成区域的详细结构。观测值对于研究恒星形成很重要。我们已经对银河系的几个星形形成场进行了深层和高分辨率的成像，其波长为1.25mum（j band），1.65 Mum（H频段），2.20 MUM（K-band）（K-Band）。大量数据减少和分析后，我们已经成功地发现了从未在其他波波上据报道过的许多基础来源。我们还采用PSF光度法进行了对每个红外源的仔细光度法。该数据已被接受用于天体物理学期刊补充剂的出版物。Furthermore，我们在仙女座星系中发现了新型的物体，其红外色为高红色，大概被认为是andromeda Galaxy中的原始恒星或超级风格AGB恒星的候选者。这种对象是唯一的，是在银河系中首次检测到的。在天体物理期刊信中的出版物已接受结果。这些物体将是日本国家大型望远镜未来光谱法的最佳目标之一。

项目成果

Vansevicius, V., Arimoto, N., Kodaira, K.: "Extinction effects on galaxy counts for buldge-disk galaxies" The Astrophysical Journal. 474. 623-629 (1997)

Vansevicius, V.、Arimoto, N.、Kodaira, K.：“灭绝对球核盘星系的星系计数的影响”《天体物理学杂志》。

V.Vansevicius、有本、小平: "Extinction effects on galaxy counts for bulge-disk galaxies" The Astrophysical Journal. 474. 623-629 (1997)

V. Vansevicius、Arimoto、Kodaira：“核球盘星系的灭绝效应”《天体物理学杂志》474. 623-629 (1997)。

Tamura,M.: "One Millimeter Polarimetry of Young Stellar Objects:Low-Mass Protostars and T Tauri Stars" Astrophysical Journal. 448. 346-355 (1995)

Tamura,M.：“年轻恒星物体的一毫米偏振测量：低质量原恒星和 T Tauri 恒星”天体物理学杂志。

山崎典子、 宮崎 聡, 他: "Hard X-ray emission form the Galactic ridge" The Astrophysical Journal. 481. 821-831 (1997)

Noriko Yamazaki、Satoshi Miyazaki 等人：“银河脊的硬 X 射线发射”《天体物理学杂志》481. 821-831 (1997)。

V.Vansevicius, 有本 信雄, 小平 桂一: "Extinction effects on galaxy counts for bulge-disk galaxies" The Astrophysical Journal. 474. 623-629 (1997)

V.Vansevicius、Nobuo Arimoto、Keiichi Kodaira：“核球盘星系的灭绝效应”《天体物理学杂志》474. 623-629 (1997)。