标题： 中红外/远红外盲、大区域、光谱调查在突破混淆极限中的有效性 显示英文标题

标题： The Effectiveness of Mid IR / Far IR Blind, Wide Area, Spectral Surveys in Breaking the Confusion Limit

摘要： 源混淆定义了对大区域星系外调查应采取的实际深度。 具有位置和光谱信息的三维成像光谱仪，然而，可能提供一种利用线发射来打破传统混淆极限的方法。 在本文中，我们介绍了对中远红外、大范围光谱调查在打破混淆极限方面的有效性的研究结果。 我们以SAFARI为例，SAFARI是为拟议的JAXA主导的SPICA任务提出的远红外成像傅里叶变换光谱仪概念。 我们生成了代表100个SAFARI足迹的人工天空，并使用完全自动化的红移确定方法，为明亮端和爆发模式星系演化模型中的空间和光谱混淆源检索红移。 我们发现，对于最亮的光谱混淆源，能够准确检索出38/54%的红移，其连续谱通量甚至比120$\mu$m的光度混淆极限低一个数量级。 此外，我们还准确检索出第二亮的光谱混淆源的38/29%的红移。 我们的结果表明，使用SAFARI进行的深度光谱线调查可以打破传统的光度混淆极限，并且不仅能够解析，还能为大量以前无法访问的星系提供红移。 最后，我们讨论了该技术的一些局限性以及进一步的工作。 显示英文摘要

摘要： Source confusion defines a practical depth to which to take large-area extragalactic surveys. 3D imaging spectrometers with positional as well as spectral information, however, potentially provide a means by which to use line emission to break the traditional confusion limit. In this paper we present the results of our investigation into the effectiveness of mid/far infrared, wide-area spectroscopic surveys in breaking the confusion limit. We use SAFARI, a FIR imaging Fourier Transform Spectrometer concept for the proposed JAXA-led SPICA mission, as a test case. We generate artificial skies representative of 100 SAFARI footprints and use a fully-automated redshift determination method to retrieve redshifts for both spatially and spectrally confused sources for bright-end and burst mode galaxy evolution models. We find we are able to retrieve accurate redshifts for 38/54% of the brightest spectrally confused sources, with continuum fluxes as much as an order of magnitude below the 120 $\mu$m photometric confusion limit. In addition we also recover accurate redshifts for 38/29% of the second brightest spectrally confused sources. Our results suggest that deep, spectral line surveys with SAFARI can break the traditional photometric confusion limit, and will also not only resolve, but provide redshifts for, a large number of previously inaccessible galaxies. To conclude we discuss some of the limitations of the technique, as well as further work.