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Star forming regions in the Andromeda galaxy

仙女座星系中的恒星形成区域

基本信息

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

项目摘要

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，仙女座星系是从北方半球可以到达的最近的大星系，并揭示其星星形成区的详细结构。这些观测结果对研究大星系尺度下的星星形成具有重要意义。我们在1.25 μ m（J波段）、1.65 μ m（H波段）、2.20 μ m（K波段）波段对银河系的几个星星形成场进行了深分辨和甚高分辨率成像，经过大量的数据处理和分析，成功地探测到了一些在其他波段从未报道过的红外源。我们还进行了仔细的测光每个红外光源，采用PSF测光技术。此外，我们还在仙女座星系中发现了新类型的天体，它们的红外线颜色是高红色，可能被认为是仙女座星系中原恒星或超风相AGB星的候选者。这类天体是独一无二的，在银河系中首次被发现。研究结果已被接受发表在《天体物理学杂志快报》上。这些天体将成为正在建设中的日本国家大型望远镜未来光谱学的最佳目标之一。