首页> 外文期刊>The Astrophysical Journal. Letters >Detection of CH_4 in the GV TAU N protoplanetary disk
【24h】

Detection of CH_4 in the GV TAU N protoplanetary disk

机译:检测GV Tau N原型盘中的CH_4

获取原文
获取原文并翻译 | 示例
           

摘要

T Tauri stars are low mass young stars that may serve as analogs to the early solar system. Observations of organic molecules in the protoplanetary disks surrounding T Tauri stars are important for characterizing the chemical and physical processes that lead to planet formation. Searches for undetected molecules, particularly in the inner, planet forming regions of these disks are important for testing protoplanetary disk chemical models and for understanding the evolution of volatiles through the star and planet formation process. We used NIRSPEC on Keck 2 to perform a high resolution (λ/Δλ ~ 25,000) L-band survey of T Tauri star GV Tau N. This object is one of two in which the simple organic molecules HCN and C_2 H_2 have been reported in absorption in the warm molecular layer of the protoplanetary disk. In this Letter, we report the first detection of methane, CH_4, in a protoplanetary disk. Specifically, we detected the ν_3 band in absorption. We determined a rotational temperature of 750 ± 50 K and column density of (2.8 ± 0.2) × 10~(17) cm~(-2). Our results imply that CH_4 originates in the warm molecular layer of the inner protoplanetary disk.
机译:Tauri Stars是低质量的年轻恒星,可作为早期太阳系的类似物。围绕TAURI恒星的原生偶磁盘中有机分子的观察对于表征导致行星形成的化学和物理过程非常重要。搜索未检测到的分子,特别是在这些盘的内部,行星形成区域对于测试原始盘化学模型以及通过星和行星形成过程来了解挥发物的演变是重要的。我们在Keck 2上使用了NIRSPEC以执行T Tauri Star GV Tau N的高分辨率(λ/Δλ〜25,000)L波段调查。该目的是据报道的简单有机分子HCN和C_2 H_2中的两个。在原生型盘的温热分子层中吸收。在这封信中,我们报告了第一次检测原文象盘中的甲烷,CH_4。具体地,我们在吸收中检测到ν_3带。我们确定的旋转温度为750±50 k,柱密度(2.8±0.2)×10〜(17)cm〜(-2)。我们的结果意味着CH_4起源于内部原生型盘的温暖分子层。

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