Herschel Multitiered Extragalactic Survey: clusters of dusty galaxies uncovered by Herschel? and Planck†
Herschel Multitiered Extragalactic Survey: clusters of dusty galaxies uncovered by Herschel? and Planck†
复制标题
赫歇尔多层河外巡天：赫歇尔发现的尘埃星系团？
DOI：
10.1093/mnras/stt2253
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发表时间：
2014
影响因子：
4.8
通讯作者：
Clements D
中科院分区：
文献类型：
--
作者：
Clements D
普朗克探测尘埃星系团的可能性，恒星形成的星系在z> 1的检查赫歇尔SPIRE图像的普朗克早期发布紧凑源目录源躺在现场的赫歇尔多层河外巡天观察。16 Plancksources谎言在1990平方米。°的检查，我们发现，12个与单一的brightHerschel源。剩下的四个与赫歇尔源的密度过高有关，使它们成为尘埃、恒星形成星系的候选星团。我们使用这些“团块”的补充光学/近红外数据来测试这一想法，并在所有四种情况下找到星系团存在的证据。我们使用测光红移和红序星系来估计这些星系团的红移，发现它们的范围从0.8到2.3。这些红移意味着这些星系团中的赫歇尔源，也就是普朗克通量的来源，正在非常迅速地形成恒星，典型的总星系团星星形成速率>1000 M·yr-1。在这些观测中发现的高红移星系团被用来限制星系团星系形成的时代，发现我们星系团中的星系是1-1.5 Gyr的atz 1-2。不仅利用所有的天普巡天，而且利用更深、更小面积的赫歇尔巡天，讨论了发现更多尘埃星系团的前景。
The potential forPlanckto detect clusters of dusty, star-forming galaxies atz> 1 is tested by examining theHerschel-SPIRE images ofPlanckEarly Release Compact Source Catalog sources lying in fields observed by theHerschelMultitiered Extragalactic Survey. Of the 16Plancksources that lie in the ∼90 sq. deg. examined, we find that 12 are associated with single brightHerschelsources. The remaining four are associated with overdensities ofHerschelsources, making them candidate clusters of dusty, star-forming galaxies. We use complementary optical/near-IR data for these ‘clumps’ to test this idea, and find evidence for the presence of galaxy clusters in all four cases. We use photometric redshifts and red sequence galaxies to estimate the redshifts of these clusters, finding that they range from 0.8 to 2.3. These redshifts imply that theHerschelsources in these clusters, which contribute to the detectedPlanckflux, are forming stars very rapidly, with typical total cluster star formation rates >1000 M⊙yr−1. The high-redshift clusters discovered in these observations are used to constrain the epoch of cluster galaxy formation, finding that the galaxies in our clusters are 1–1.5 Gyr old atz∼ 1–2. Prospects for the discovery of further clusters of dusty galaxies are discussed, using not only all skyPlancksurveys, but also deeper, smaller area,Herschelsurveys.