首页> 外文期刊>The Astrophysical journal >Isotopic Ratios In Titan's Atmosphere From Cassini Cirs Limb Sounding: co_2 At Low And Midlatitudes
【24h】

Isotopic Ratios In Titan's Atmosphere From Cassini Cirs Limb Sounding: co_2 At Low And Midlatitudes

机译:卡西尼号上肢测深仪在泰坦大气中的同位素比:低纬和中纬度的co_2

获取原文
获取原文并翻译 | 示例
           

摘要

This Letter reports on a search for infrared emissions of isotopologues of CO_2 in the atmosphere of Titan using spectral data recorded by the Cassini Composite Infrared Spectrometer (CIRS). We have made a successful 6.5 σ detection of ~(13)CO_2 at a fraction CO_2/~(13)CO_2 = 84 ± 17, consistent with measurements of ~(12)C/~(13)C in other species, and also the terrestrial value (89). We also find a probable 3.5 σ detection of C~(16)O~(18)O at a fraction CO~2/ C~(16)O~(18)O = 173 ± 55, slightly lower than the terrestrial value (253) and consistent with the twofold enhancement in ~(18)O reported previously in CO, or with an intermediate value as suggested by chemistry. These isotopic ratios provide important constraints on models of the formation, evolution, and current processes in Titan's atmosphere.
机译:这封信报道了使用卡西尼复合红外光谱仪(CIRS)记录的光谱数据搜索泰坦大气中CO_2的同位素同位素的红外发射的信息。我们已经成功地以分数CO_2 /〜(13)CO_2 = 84±17进行了〜(13)CO_2的6.5σ检测,与其他物种的〜(12)C /〜(13)C值相符,并且地面值(89)。我们还发现以CO〜2 / C〜(16)O〜(18)O = 173±55的分数检测到C〜(16)O〜(18)O的3.5σ可能略低于地面值( 253)并与先前在CO中报道的〜(18)O的两倍增强相一致,或与化学方法建议的中间值一致。这些同位素比对土卫六大气层的形成,演化和当前过程模型提供了重要的约束。

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