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arXiv 0909.5044astro-ph.COastro-ph.GA
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远红外光谱宇宙学巡天

Spectroscopic Cosmological Surveys in the Far-IR

L. Spinoglio, M. Magliocchetti, S. Tommasin, A. M. Di Giorgio, C. Gruppioni, G. De Zotti, A. Franceschini, M. Vaccari, K. Isaak, F. Pozzi, M. A. Malkan

摘要:

我们展示了用SPICA星载SAFARI仪器进行光谱宇宙学巡天的可行性。这项工作是通过模拟,利用两种经验的方法,即使用观测到的光度函数和理论模型的星系形成和演变。根据对星系局部样品的观测,导出了活动星系核示踪线辐射与恒星形成活动之间的关系。结果表明,SAFARI FTS在不同分辨率下的盲光谱学可以用于研究从本地宇宙到遥远宇宙(z~3)的星系演化。具体来说,两个不同且独立的星系演化模型预测,在2 'x 2' SAFARI视场中,大约有7-10个源在一条以上的线上被光谱检测到,下降到SAFARI的预期通量极限,其中大约20%的源在z>2时被检测到。因此,SPICA-SAFARI将在探测高Z源和直接评估其性质(例如,是否主要是活动星系核或恒星形成动力)方面表现出色,这要归功于盲光谱学。

英文摘要:

We show the feasibility of spectroscopic cosmological surveys with the SAFARI instrument onboard of SPICA. The work is done through simulations that make use of both empirical methods, i.e. the use of observed luminosity functions and theoretical models for galaxy formation and evolution. The relations assumed between the line emission to trace AGN and star formation activity have been derived from the observations of local samples of galaxies. The results converge to indicate the use of blind spectroscopy with the SAFARI FTS at various resolutions to study galaxy evolution from the local to the distant (z~3) Universe. Specifically, two different and independent galaxy evolution models predict about 7-10 sources to be spectroscopically detected in more than one line in a 2'x 2'SAFARI field of view, down to the expected flux limits of SAFARI, with about 20% of sources to be detected at z>2. SPICA-SAFARI will be therefore excellent at detecting high-z sources and at assessing in a direct way their nature (e.g whether mainly AGN or Star Formation powered) thanks to blind spectroscopy.

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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