首页> 外文期刊>Nature >Earth's transmission spectrum from lunar eclipse observations
【24h】

Earth's transmission spectrum from lunar eclipse observations

机译:月食观测的地球传输光谱

获取原文
获取原文并翻译 | 示例
           

摘要

Of the 342 planets so far discovered orbiting other stars, 58 'transit' the stellar disk, meaning that they can be detected through a periodic decrease in the flux of starlight. The light from the star passes through the atmosphere of the planet, and in a few cases the basic atmospheric composition of the planet can be estimated. As we get closer to finding analogues of Earth, an important consideration for the characterization of extrasolar planetary atmospheres is what the transmission spectrum of our planet looks like. Here we report the optical and near-infrared transmission spectrum of the Earth, obtained during a lunar eclipse. Some biologically relevant atmospheric features that are weak in the reflection spectrum (such as ozone, molecular oxygen, water, carbon dioxide and methane) are much stronger in the transmission spectrum, and indeed stronger than predicted by modelling1011. We also find the 'fingerprints' of the Earth's ionosphere and of the major atmospheric constituent, molecular nitrogen (N_2), which are missing in the reflection spectrum.
机译:到目前为止,在342个行星中发现有其他恒星运行,其中58个行星“穿越”了恒星盘,这意味着可以通过周期性减少星光通量来检测到它们。来自恒星的光穿过行星的大气层,在少数情况下,可以估算出行星的基本大气成分。随着我们越来越接近地球的类似物,表征太阳系外行星大气的一个重要考虑因素就是我们的行星的透射光谱。在这里,我们报告在月食期间获得的地球的光学和近红外透射光谱。在反射光谱中较弱的一些与生物有关的大气特征(例如臭氧,分子氧,水,二氧化碳和甲烷)在透射光谱中要强得多,的确比模型10预测的要强。我们还发现了地球电离层和主要大气成分分子氮(N_2)的“指纹”,它们在反射光谱中缺失。

著录项

  • 来源
    《Nature》 |2009年第7248期|814-816|共3页
  • 作者单位

    Instituto de Astrofisica de Canarias, Via Lactea s, E38205 La Laguna, Tenerife, Spain;

    Instituto de Astrofisica de Canarias, Via Lactea s, E38205 La Laguna, Tenerife, Spain;

    Instituto de Astrofisica de Canarias, Via Lactea s, E38205 La Laguna, Tenerife, Spain;

    Instituto de Astrofisica de Canarias, Via Lactea s, E38205 La Laguna, Tenerife, Spain;

    Instituto de Astrofisica de Canarias, Via Lactea s, E38205 La Laguna, Tenerife, Spain Physics Department, University of Central Florida, PO Box 162385, Orlando, Florida 32816, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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