首页> 外文期刊>The Astrophysical journal >A COMPACT STARBURST CORE IN THE DUSTY LYMAN BREAK GALAXY WESTPHAL-MD11
【24h】

A COMPACT STARBURST CORE IN THE DUSTY LYMAN BREAK GALAXY WESTPHAL-MD11

机译:尘土飞扬的LYMAN BREAK GALAXY WESTPHAL-MD11中的紧凑星暴核心

获取原文
获取原文并翻译 | 示例
           

摘要

Using the IRAM Plateau de Bure Interferometer, we have searched for CO (3-2) emission from the dusty Lyman break galaxy Westphal-MD11 at z = 2.98. Our sensitive upper limit is surprisingly low relative to the system's 850 μm flux density and implies a far-IR/CO luminosity ratio as elevated as those seen in loeal ultraluminous mergers. We conclude that the observed dust emission must originate in a compact structure radiating near its blackbody limit and that a relatively modest molecular gas reservoir must be fueling an intense nuclear starburst (and/or deeply buried active nucleus) that may have been triggered by a major merger. In this regard, Westphal-MD11 contrasts strikingly with the lensed Lyman break galaxy MS 1512—cB58, which is being observed apparently midway through an extended episode of more quiescent disk star formation.
机译:使用IRAM Plateau de Bure干涉仪,我们搜索了尘土飞扬的莱曼断裂星系Westphal-MD11在z = 2.98时的CO(3-2)发射。相对于系统的850μm的通量密度,我们的敏感上限令人惊讶地低,并且暗示远红外/二氧化碳光度比与油性超发光合并中看到的一样高。我们得出的结论是,观测到的粉尘排放必须起源于辐射到其黑体极限附近的紧凑结构,并且相对适度的分子气体储层必须正在助长可能是由大火星触发的强烈核爆炸(和/或深埋的活性核)。合并。在这方面,韦斯特法尔MD11与透镜状的莱曼断裂星系MS 1512-cB58形成鲜明对比,显然是在更静止的盘状恒星形成的扩展事件中途观测到的。

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