强引力透镜揭示的z=6处一个尘埃恒星形成星系
星系天体物理
2018-05-28 v3
摘要
自发现以来，亚毫米波选星系(SMGs)已经革新了星系形成与演化领域。在亚毫米波长绘制的数百平方度中，仅有少数源被确认位于z>5，且仅有两例在z>6。所有这些SMGs都是恒星形成率(SFRs)>1000 M_sun/yr的极端星暴星系的罕见例子，因此不代表尘埃恒星形成星系的一般总体。因此，我们在最早时期对这些源本质的理解仍不完整。在此我们报告一个在z=6.027处受引力放大的(μ = 9.3 ± 1.0)尘埃恒星形成星系的光谱证认。在修正引力透镜后，我们推导出该源固有的较不极端的SFR为380 ± 50 M_sun/yr，并发现其气体和尘埃性质与本地极亮红外星系(ULIRGs)测量的相似，将本地趋势扩展到早期宇宙中探索匮乏的疆域。该星系的恒星形成效率与其本地类似物中测量的相似，尽管宇宙时间相差约12 Gyr。
引用
@article{arxiv.1707.09022,
title = {A dusty star-forming galaxy at z=6 revealed by strong gravitational lensing},
author = {Jorge A. Zavala and Alfredo Montaña and David H. Hughes and Min S. Yun and R. J. Ivison and Elisabetta Valiante and David Wilner and Justin Spilker and Itziar Aretxaga and Stephen Eales and Vladimir Avila-Reese and Miguel Chávez and Asantha Cooray and Helmut Dannerbauer and James S. Dunlop and Loretta Dunne and Arturo I. Gómez-Ruiz and Michal J. Michalowski and Gopal Narayanan and Hooshang Nayyeri and Ivan Oteo and Daniel Rosa González and David Sánchez-Argüelles and Stephen Serjeant and Matthew W. L. Smith and Elena Terlevich and Olga Vega and Alan Villalba and Paul van der Werf and Grant W. Wilson and Milagros Zeballos},
journal= {arXiv preprint arXiv:1707.09022},
year = {2018}
}
备注
Published in Nature Astronomy. This is the author's version of the accepted paper (posted 6 months after publication in accordance with Nature policy). The published version is available at https://www.nature.com/articles/s41550-017-0297-8