6月8日 Overcoming nightmares to reach your dream - submillimetre stacking of z > 3 UV-selected galaxies----中国科学院紫金山天文台

报告题目：Overcoming nightmares to reach your dream - submillimetre stacking of z > 3 UV-selected galaxies

报告人：Thomas Greve（Univ. College London）

报告摘要：We have carried out stacking analyses at radio (VLA, GMRT), sub-millimetre (LABOCA, SPIRE), and far-IR (PACS) wavelenghts for large samples of z = 3, 4, 5, and 6 Lyman Break Galaxies (LBGs). The UV/optical/near-IR spectral energy distributions (SEDs) of these (rest-frame) UV-selected galaxies have been modelled in detail, resulting in robust estimates of their un-obscured star formation rates (SFRs), stellar masses, and dust-extinction. The latter can be translated into a model-predicted IR luminosity (assuming that all the UV photons absorbed by the dust are re-emitted in the IR), which in turn can be compared our direct constraints on the IR luminosity obtained from our radio/submm/far-IR stacks. We find a remarkable good agreement between these two distinctly different ways of estimating the IR luminosity. The UV/optical/near-IR models depend on the assumed star formation history (three different scenarios are assumed: a declining, a constant, and a rising star formation history) - and we have used the above comparison to determine the most likely star formation history. We also discuss our results in the context of the IRX-beta relation (Meurer+99). Final disclaimer: this is work in progress, and critique and/or input will be much appreciated.

报告时间：2013年6月8日（星期六）下午4：00

报告地点：紫台办公大楼619会议室

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