在TMC-1的GOTHAM观测中寻找杂环
A Search for Heterocycles in GOTHAM Observations of TMC-1
摘要：
我们已经进行了广泛的搜索氮，氧和硫轴承杂环对金牛座分子云1（TMC-1）使用深，宽带厘米波长谱线调查该地区的GOTHAM大型项目的绿岸望远镜。尽管它们在陆地化学中无处不在，并且在来源中确认存在一些环状和多环烃物种，但我们没有发现任何杂环物种存在的证据。在这里，我们报告推导出的上限，这些分子的列密度得到马尔可夫链蒙特卡罗（MCMC）分析，并比较这种方法传统的单线上限测量。我们进一步假设为什么这些分子在我们的数据中不存在，它们如何在星际空间中形成，以及确保它们的检测所需的观测性质。
英文摘要：
We have conducted an extensive search for nitrogen-, oxygen- and sulfur-bearing heterocycles toward Taurus Molecular Cloud 1 (TMC-1) using the deep, broadband centimeter-wavelength spectral line survey of the region from the GOTHAM large project on the Green Bank Telescope. Despite their ubiquity in terrestrial chemistry, and the confirmed presence of a number of cyclic and polycyclic hydrocarbon species in the source, we find no evidence for the presence of any heterocyclic species. Here, we report the derived upper limits on the column densities of these molecules obtained by Markov Chain Monte Carlo (MCMC) analysis and compare this approach to traditional single-line upper limit measurements. We further hypothesize why these molecules are absent in our data, how they might form in interstellar space, and the nature of observations that would be needed to secure their detection.
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