期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 407, 期 1, 页码 L1-L5出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1745-3933.2010.00880.x
关键词
stars: formation; stars: Population II; galaxies: high-redshift; galaxies: evolution; galaxies: luminosity function, mass function; galaxies: stellar content; cosmology: theory
资金
- Netherlands Organization for Scientific Research
With the aim of determining if Milky Way (MW) progenitors could be identified as high-redshift Lyman Alpha Emitters (LAEs), we have derived the intrinsic properties of z approximate to 5.7 MW progenitors, which are then used to compute their observed Ly alpha luminosity, L(alpha), and equivalent width (EW). MW progenitors visible as LAEs are selected according to the canonical observational criterion, L(alpha) > 10(42) erg s(-1) and EW > 20 angstrom. Progenitors of MW-like galaxies have L(alpha) = 10(39-43.25) erg s(-1), making some of them visible as LAEs. In any single MW merger tree realization, typically only one (out of approximate to 50) progenitor meets the LAE selection criterion, but the probability of having at least one LAE is very high, P = 68 per cent. The identified LAE stars have ages t(*) approximate to 150-400 Myr at z approximate to 5.7, with the exception of five small progenitors with t(*) < 5 Myr and large EW = 60-130 angstrom. LAE MW progenitors provide > 10 per cent of the halo very metal-poor stars [Fe/H] < -2, thus establishing a potentially fruitful link between high-z galaxies and the local Universe.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据