• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical Journal. Letters >The fmos-cosmos survey of star-forming galaxies at z ～ 1.6. I. Hα-based star formation rates and dust extinction
【24h】

The fmos-cosmos survey of star-forming galaxies at z ～ 1.6. I. Hα-based star formation rates and dust extinction

机译：z〜1.6处恒星形成星系的fmos-cosmos调查。一，基于Hα的恒星形成率和尘埃消灭

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

We present the first results from a near-IR spectroscopic survey of the COSMOS field, using the Fiber Multi-Object Spectrograph on the Subaru telescope, designed to characterize the star-forming galaxy population at 1.4 < z < 1.7. The high-resolution mode is implemented to detect Hα in emission between 1.6-1.8 μm with f_(Hα) ? 4 × 10 ~(-17) erg cm~(-2) s~(-1). Here, we specifically focus on 271 sBzK-selected galaxies that yield a Hα detection thus providing a redshift and emission line luminosity to establish the relation between star formation rate and stellar mass. With further J-band spectroscopy for 89 of these, the level of dust extinction is assessed by measuring the Balmer decrement using co-added spectra. We find that the extinction (0.6 ? A _(Hα) ? 2.5) rises with stellar mass and is elevated at high masses compared to low-redshift galaxies. Using this subset of the spectroscopic sample, we further find that the differential extinction between stellar and nebular emission E_(star) (B-V)/E_(neb)(B-V) is 0.7-0.8, dissimilar to that typically seen at low redshift. After correcting for extinction, we derive an Hα-based main sequence with a slope (0.81 ± 0.04) and normalization similar to previous studies at these redshifts.
机译：我们使用斯巴鲁望远镜上的光纤多目标光谱仪介绍了COSMOS场的近红外光谱调查的第一个结果，该光谱仪旨在表征1.4

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