期刊
ASTROPHYSICAL JOURNAL
卷 654, 期 1, 页码 L33-L36出版社
UNIV CHICAGO PRESS
DOI: 10.1086/510902
关键词
cosmology : observations; galaxies : evolution; galaxies : formation; galaxies : individual (LBG J213512.73-010143)
资金
- STFC [ST/F002963/1] Funding Source: UKRI
Using Hubble Space Telescope imaging and Keck spectroscopy, we report the discovery of a very bright, highly magnified (similar to 30 times) Lyman break galaxy (LBG) at z = 3.07 in the field of the massive z = 0.33 cluster MACS J2135.2 - 0102. The system comprises two high surface brightness arcs with a maximum extent of 3, bracketing a central object that we identify as a massive early-type galaxy at z = 0.73. We construct a lens model that reproduces the main features of the system using a combination of a galaxy-scale lens and the foreground cluster. We show that the morphological, spectral, and photometric properties of the arcs are consistent with them arising from the lensing of a single similar to L-V* BG. The most important feature of this system is that the lensing magnification results in an apparent magnitude of r = 20.3, making this one of the brightest LBGs known. Such a high magnification provides the opportunity of obtaining very high signal-to-noise ratio ( and potentially spatially resolved) spectroscopy of a high-redshift galaxy to study its physical properties. We present initial imaging and spectroscopy demonstrating the basic properties of the system and discuss the opportunities for future observations.
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