论文标题
发现最紫外线的恒星形成星系：一个年轻，灰尘和金属贫穷的星爆，带有QSO般的亮度
The discovery of the most UV-Lya luminous star-forming galaxy: a young, dust- and metal-poor starburst with QSO-like luminosities
论文作者
论文摘要
我们报告了z = 2.469的boss-euvlg1的发现，这是迄今为止在任何红移中众所周知的最发光，几乎不掩饰的星形的星系。对Baryon振荡光谱调查中的首次归类为QSO，对Gran Telescopio Canarias进行了后续观察，表明其较大的亮度，MUV = -24.40和log（L_lya/Erg S-1）= 44.0，是由于强烈的星星形态而引起的，而无需强烈的星星脉冲，而不是agn或Graveritation或Graveritation或Graftitation或Graftitation或Graftitation或Graftitation或Graftitationallitation lonsing上。 boss-euvlg1是一种紧凑型（REFF = 1.2 kpc），年轻（4-5 Myr）的Starburst，具有出色的质量日志（m*/msun）= 10.0 +/- 0.1，而巨大的星形形成率为〜1000 msun yr-1。但是，它是金属和粉尘（12 +log（O/h）= 8.13 +/- 0.19，E（B-V）= 0.07，log（lir/luv）<-1.2），这表明我们目睹了一个强烈的星空的早期阶段，这是一个没有时间丰富ISM的强烈星光。 Boss-euvlg1可能代表了一个短期（<100 myrs），但在高红移中的星形星系的重要阶段，但在先前的调查中遗漏了。在星系进化方案中，Boss-Euvlg1可能也可能代表大规模静止星系的演变中的最初阶段，甚至在尘土飞扬的星形阶段之前。
We report the discovery of BOSS-EUVLG1 at z=2.469, by far the most luminous, almost un-obscured star-forming galaxy known at any redshift. First classified as a QSO within the Baryon Oscillation Spectroscopic Survey, follow-up observations with the Gran Telescopio Canarias reveal that its large luminosity, MUV = -24.40 and log(L_Lya/erg s-1) = 44.0, is due to an intense burst of star-formation, and not to an AGN or gravitational lensing. BOSS-EUVLG1 is a compact (reff = 1.2 kpc), young (4-5 Myr) starburst with a stellar mass log(M*/Msun) = 10.0 +/- 0.1 and a prodigious star formation rate of ~1000 Msun yr-1. However, it is metal- and dust-poor (12+log(O/H) = 8.13 +/- 0.19, E(B-V) = 0.07, log(LIR/LUV) < -1.2), indicating that we are witnessing the very early phase of an intense starburst that has had no time to enrich the ISM. BOSS-EUVLG1 might represent a short-lived (<100 Myrs), yet important phase of star-forming galaxies at high redshift that has been missed in previous surveys. Within a galaxy evolutionary scheme, BOSS-EUVLG1 could likely represent the very initial phases in the evolution of massive quiescent galaxies, even before the dusty star-forming phase.
