Mid-Infrared Identifications of SCUBA Galaxies in the CUDSS 14 Hour Field with the Spitzer Space Telescope

Mid-Infrared Identifications of SCUBA Galaxies in the CUDSS 14 Hour Field with the Spitzer Space Telescope
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使用斯皮策太空望远镜对 CUDSS 14 小时场中的 SCUBA 星系进行中红外识别

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发表时间:
2006
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通讯作者:
G. Fazio
G. Fazio
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作者:
M. Ashby;S. Dye;J.;S. Eales;S. Willner;T. Webb;P. Barmby;D. Rigopoulou;E. Egami;H. McCracken;S. Lilly;S. Miyazaki;M. Brodwin;M. Blaylock;J. Cadien;G. Fazio

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我们在 CUDSS 14 小时视场中识别出了 17 个可能的 8.0 μm 亚毫米星系对应物,这些星系是通过斯皮策太空望远镜上的 IRAC 和 MIPS 仪器进行的深度成像得出的。 17 个对应物中有 10 个与之前在较短波长下识别出的不一样。我们认为,与近红外或光学选择相比,8.0 μm 选择提供了更好的方法来识别亚毫米星系的对应物。根据全色光谱能量分布(SED),大多数对应物似乎是由正在进行的恒星形成提供动力的。 SED 的幂律拟合表明,8.0 μm 选定的对应样本中的五个物体含有主要的活动星系核(AGN;第六个物体被确定为可能的 AGN)。红外选择对应物的 3.6-8.0 μm 颜色明显比 CUDSS 14 小时视野中的一般 IRAC 星系群更红。
We identify 17 possible 8.0 μm selected counterparts to the submillimeter galaxies in the CUDSS 14 hour field, derived from deep imaging carried out with the IRAC and MIPS instruments aboard the Spitzer Space Telescope. Ten of the 17 counterparts are not the same as those previously identified at shorter wavelengths. We argue that 8.0 μm selection offers a better means for identifying counterparts to submillimeter galaxies than near-infrared or optical selection. Based on the panchromatic spectral energy distributions (SEDs), most counterparts appear to be powered by ongoing star formation. Power-law fits to the SEDs suggest that five objects in the 8.0 μm selected counterpart sample harbor dominant active galactic nuclei (AGNs; a sixth object is identified as a possible AGN). The 3.6-8.0 μm colors of the infrared-selected counterparts are significantly redder than the general IRAC galaxy population in the CUDSS 14 hour field.