AKARI深SEP巡天中的星系颜色
Galaxy Colours in the AKARI Deep SEP Survey
摘要：
我们调查的河外人口通过颜色标准的隔离产生一个有效的和廉价的方法来选择特定的源人口作为远红外通量的函数。结合星系演化的情况下，详细的光谱库的星系，我们产生模拟的目录将河外人口的分离成组件类型（正常，恒星形成，活动星系核）通过颜色切割。作为一个实际应用，我们将我们的标准应用于AKARI（原ASTRO-F）卫星在远红外线中进行的最深调查。利用远红外探测器（FIS，AKARI上的焦平面仪器之一）的远红外波段，我们成功地分离了正常，星爆和ULIRG人口。我们还表明，额外的MIR成像从AKARI的红外相机（IRC），显着的污染和/或简并可以进一步减少，并显示一个特殊的例子，冷正常星系和冷ULIRG源的分离。我们的结论是，我们的标准提供了一个有效的手段，选择源人口（包括罕见的发光物体），并产生颜色隔离的源计数，而不需要时间密集的地面跟踪，以区分一般的星系人口。
英文摘要：
We investigate the segregation of the extragalactic population via colour criteria to produce an efficient and inexpensive methodology to select specific source populations as a function of far-infrared flux. Combining galaxy evolution scenarios and a detailed spectral library of galaxies, we produce simulated catalogues incorporating segregation of the extragalactic population into component types (Normal, star-forming, AGN) via color cuts. As a practical application we apply our criteria to the deepest survey to be undertaken in the far-infrared with the AKARI (formerly ASTRO-F) satellite. Using the far-infrared wavebands of the Far-Infrared Surveyor (FIS, one of the focal-plane instruments on AKARI) we successfully segregate the normal, starburst and ULIRG populations. We also show that with additional MIR imaging from AKARI's Infrared Camera (IRC), significant contamination and/or degeneracy can be further decreased and show a particular example of the separation of cool normal galaxies and cold ULIRG sources. We conclude that our criteria provide an efficient means of selecting source populations (including rare luminous objects) and produce colour-segregated source counts without the requirement of time intensive ground-based follow up to differentiate between the general galaxy population.
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