• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >A COMPANION TO A QUASAR AT REDSHIFT Z=4.7
【24h】

A COMPANION TO A QUASAR AT REDSHIFT Z=4.7

机译：REDSHIFT Z = 4.7时与类比的同伴

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

THERE is a growing consensus that the emergence of quasars at high redshifts is related to the onset of galaxy formation(1), suggesting that the detection of concentrations of gas accompanying such quasars should provide flues about the early history of galaxies. Quasar companions have been recently identified at redshifts up to z approximate to 3 (refs 2-4). Here we report observations of Lyman-alpha emission (a tracer of ionized hydrogen) from the companion to a quasar at z = 4.7, corresponding to a time when the Universe was less than ten per cent of its present age. We argue that most of the emission arises in a gaseous nebula that has been photoionized by the quasar, but an additional component of continuum light-perhaps quasar light scattered from dust in the companion body, or emission from young stars within the nebula-appears necessary to explain the observations. These observations may be indicative of the first stages in the assembly of galaxy-sized structures. [References: 28]
机译：越来越多的人认为类星体在高红移状态下的出现与星系形成的开始有关（1），这表明伴随类星体的气体浓度的检测应该提供有关星系早期历史的信息。最近已经确定了类星体伴星，其红移高达z大约为3（参考2-4）。在这里，我们报告了从伴星到类星体在z = 4.7处的莱曼α发射（离子化氢的示踪剂）的观测结果，这对应于宇宙小于其当前年龄的百分之十的时间。我们认为，大部分发射来自类星体已将其离子化的气态星云，但是连续光的附加成分，可能是从伴星体内尘埃中散射的类星体光，或星云中年轻恒星的发射，看来是必要的。解释观察结果。这些观察结果可能表明了银河大小结构组装的最初阶段。 [参考：28]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号