Laboratory Measurements and Astronomical Search for Methoxyacetone and Methyl Methoxyacetate
Laboratory Measurements and Astronomical Search for Methoxyacetone and Methyl Methoxyacetate
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甲氧基丙酮和甲氧基乙酸甲酯的实验室测量和天文搜索
DOI：
10.1021/acs.jpca.2c00546
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发表时间：
2022
影响因子：
2.9
通讯作者：
Qian Gou
中科院分区：
文献类型：
--
作者：
Juncheng Lei;Meng Li;Chunguo Duan;Juan Li;Donghui Quan;Junzhi Wang;Jiayi Li;Junhua Chen;Xuefang Xu;Fengyao Zhu;Linfeng Yu;Qian Gou
通过使用脉冲喷射膨胀傅里叶变换微波光谱并借助量子计算，记录并分析了甲氧基丙酮和甲氧基乙酸甲酯的高分辨率纯旋转光谱。两种目标分子的全局最小值已在脉冲射流中检测到，其光谱以甲基内旋转引起的分裂为特征。在此基础上，利用上海天马65 m射电望远镜对大质量恒星形成区Sgr B2(N)进行了甲氧基丙酮和甲氧基乙酸甲酯的射电天文搜索。没有检测到属于任一目标分子的谱线，并得出柱密度的上限。
High-resolution pure rotational spectra of methoxyacetone and methyl methoxyacetate have been recorded and analyzed by using pulsed jet-expansion Fourier transform microwave spectroscopy with the aid of quantum calculations. The global minima for both target molecules have been detected in pulsed jet, whose spectra are featured with the splittings raised from the methyl internal rotations. On the basis of the spectroscopic results, a radio-astronomical search of methoxyacetone and methyl methoxyacetate was carried out toward the high-mass star-forming region Sgr B2(N) using the Shanghai Tianma 65 m radio telescope. No lines belonging to either of the target molecules were detected, and the upper limits to the column density were derived.