银河系外乙醇醛的首次探测
天体物理学
2019-08-14 v1
摘要
乙醇醛是单糖中最简单的一种，与生命起源直接相关。我们报告了通过IRAM PdBI在1.4、2.1和2.9 mm处的观测，在热分子核G31.41+0.31方向探测到乙醇醛（CH2OHCHO）。CH2OHCHO发射来自最接近（< 10^4 AU）（原）恒星的最热（> 300 K）和最致密（>2E8 cm^-3）区域。将数据与热核的气-粒化学模型进行比较，表明G31.41+0.31的年龄为几乘10^5 yr。我们还表明，只需在颗粒上处理少量CO，现有的热核气-粒化学模型即可重现观测到的乙醇醛柱密度，这使得表面反应成为其形成最可行的途径。
关键词
引用
@article{arxiv.0811.3821,
title = {First detection of glycolaldehyde outside the Galactic Center},
author = {M. T. Beltran and C. Codella and S. Viti and R. Neri and R. Cesaroni},
journal= {arXiv preprint arXiv:0811.3821},
year = {2019}
}
备注
Comments: 8 pages, 2 tables, 2 figures. Accepted for publication in ApJ Letter. This is an author-created, un-copyedited version of an article accepted for publication in The Astrophysical Journal Letters. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it