500微米冒口的性质I：SMA观测
The Nature of 500 micron Risers I: SMA Observations
摘要：
我们目前的SMA观测分辨率从0.35至3角秒的34个候选高红移尘埃恒星形成星系（DSFG）的样本。这些来源是从HerMES Herschel调查目录中选择的，其SED从250上升到350到500 $μ$ m，称为500-μ m。我们检测到24个这些来源的对应物，其中4个有两个对应物。我们的结论是，剩下的十个源，缺乏检测到的对应物可能有三个或更多的相关源混合在一起，以产生观察到的赫歇尔源。我们研究透镜的作用，这是预测占主导地位的最明亮的（F500 $>$ 60 mJy）的一半，我们的样本。我们发现，虽然透镜效应发挥了作用，但至少35%的明亮光源可能是多个光源，而不是透镜效应的结果。在较弱的通量，我们发现一个混合率相当，或大于，预测的40%。我们确定远红外光度和恒星形成率的非多个来源在我们的样本，并得出结论，在没有强透镜，我们的500-日冕是非常明亮的系统与L $_{FIR} > 10^{13}$ L $_{\odot}$和恒星形成率$> 1000$ M $_{\odot}$ /年。
英文摘要：
We present SMA observations at resolutions from 0.35 to 3 arcseconds of a sample of 34 candidate high redshift dusty star forming galaxies (DSFGs). These sources were selected from the HerMES Herschel survey catalogues to have SEDs rising from 250 to 350 to 500$μ$m, a population termed 500-risers. We detect counterparts to 24 of these sources, with four having two counterparts. We conclude that the remaining ten sources that lack detected counterparts are likely to have three or more associated sources which blend together to produce the observed Herschel source. We examine the role of lensing, which is predicted to dominate the brightest (F500 $>$ 60mJy) half of our sample. We find that while lensing plays a role, at least 35% of the bright sources are likely to be multiple sources rather than the result of lensing. At fainter fluxes we find a blending rate comparable to, or greater than, the predicted 40%. We determine far-IR luminosities and star formation rates for the non-multiple sources in our sample and conclude that, in the absence of strong lensing, our 500-risers are very luminous systems with L$_{FIR} > 10^{13}$L$_{\odot}$ and star formation rates $> 1000$M$_{\odot}$/yr.
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