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arXiv 1001.2106astro-ph.GA
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Hi-GAL:赫歇尔红外银道面巡天

Hi-GAL: the Herschel infrared Galactic Plane Survey

S. Molinari, the Hi-GAL Consortium

摘要:

Hi-GAL(Herschel infrared Galactic Plane Survey)是Herschel空间天文台的开放时间重点项目。它将在经度范围|l| <60度内,在70微米至500微米之间的五个波段绘制一个两度宽的条带,对内银道面进行无偏差的光度测量。Hi-GAL的目的是探测分子云和大质量恒星形成的最早阶段,并利用赫歇尔波长覆盖范围、灵敏度、绘图策略和速度的最佳组合,对星际介质中的恒星形成区域和冷结构进行均匀普查。由此产生的代表性样本将产生源温度,光度,质量和年龄的变化在广泛的银河系环境中的所有尺度从大规模的YSO在原星团的整个旋臂,提供了一个进化序列的形成中,高质量的恒星。这一信息对于制定一个预测性的全球模型至关重要,该模型可以预测环境和反馈在调节恒星形成过程中的作用。这样的模型对于理解星系尺度和早期宇宙中的恒星形成至关重要。Hi-GAL还将为未来几十年提供科学遗产,在广泛的天文学领域提供系统和偶然科学的不可估量的潜力,使未来的主要设施,如JWST和ALMA得到最佳利用。

英文摘要:

Hi-GAL, the Herschel infrared Galactic Plane Survey, is an Open Time Key Project of the Herschel Space Observatory. It will make an unbiased photometric survey of the inner Galactic Plane by mapping a two-degree wide strip in the longitude range |l|<60 degrees in five wavebands between 70um and 500um. The aim of Hi-GAL is to detect the earliest phases of the formation of molecular clouds and high-mass stars and to use the optimum combination of Herschel wavelength coverage, sensitivity, mapping strategy and speed to deliver a homogeneous census of star-forming regions and cold structures in the interstellar medium. The resulting representative samples will yield the variation of source temperature, luminosity, mass and age in a wide range of Galactic environments at all scales from massive YSOs in protoclusters to entire spiral arms, providing an evolutionary sequence for the formation of intermediate and high-mass stars. This information is essential to the formulation of a predictive global model of the role of environment and feedback in regulating the star-formation process. Such a model is vital to understanding star formation on galactic scales and in the early Universe. Hi-GAL will also provide a science legacy for decades to come with incalculable potential for systematic and serendipitous science in a wide range of astronomical fields, enabling the optimum use of future major facilities such as JWST and ALMA.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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