ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Hot Corino Survey toward Protostellar Cores in the Orion Cloud
ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): A Hot Corino Survey toward Protostellar Cores in the Orion Cloud
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DOI：
10.3847/1538-4357/ac49e0
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发表时间：
2022-01
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通讯作者：
Shih-Ying Hsu;Sheng-Yuan Liu;Tie Liu;D. Sahu;Chin-Fei Lee;K. Tatematsu;Kee-Tae Kim;N. Hirano;Yao-lun Yang;D. Johnstone;Hongli Liu;M. Juvela;L. Bronfman;H. Chen;S. Dutta;D. Eden;Kai-Syun Jhan;Y. Kuan;C. Lee;Jeong-Eun Lee;Shanghuo Li;Chun-Fan Liu;S. Qin;P. Sanhueza;H. Shang;A. Soam;A. Traficante;Jianjun Zhou
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作者：
Shih-Ying Hsu;Sheng-Yuan Liu;Tie Liu;D. Sahu;Chin-Fei Lee;K. Tatematsu;Kee-Tae Kim;N. Hirano;Yao-lun Yang;D. Johnstone;Hongli Liu;M. Juvela;L. Bronfman;H. Chen;S. Dutta;D. Eden;Kai-Syun Jhan;Y. Kuan;C. Lee;Jeong-Eun Lee;Shanghuo Li;Chun-Fan Liu;S. Qin;P. Sanhueza;H. Shang;A. Soam;A. Traficante;Jianjun Zhou
星际介质中复杂有机分子（COM）的存在引起了人们极大的兴趣，因为它可能与宇宙中生命的起源和普遍存在有关。为了调查 COM 的出现及其可能的起源，我们对原恒星核心样本进行了化学普查，作为猎户座普朗克星系冷团块阿塔卡马大型毫米/亚毫米阵列调查项目的一部分。我们报告了在 56 个 0/I 类原恒星核心中检测到的 11 个热科里诺源，这些源表现出来自温暖且丰富的 COM 的紧凑发射。所有发现的热科里诺源可能都是 0 级，其温暖区域的大小 (>100 K) 相当于 100 个天文单位。热科里诺源的光度与甲醇总量及其排放程度呈正相关。这种相关性与热科里诺存在的热解吸图一致，并表明低光度（0 级）源可能具有较小的 COM 排放区域。采用相同的样本选择方法和检测标准，考虑到云距离和有限的样本量，猎户座云（15/37）和英仙座云（28/50）中的温暖甲醇的检测率在统计上相似。观察同一组 COM 转换将带来云属性之间更丰富的信息比较。
The presence of complex organic molecules (COMs) in the interstellar medium is of great interest since it may link to the origin and prevalence of life in the universe. Aiming to investigate the occurrence of COMs and their possible origins, we conducted a chemical census toward a sample of protostellar cores as part of the Atacama Large Millimeter/submillimeter Array Survey of Orion Planck Galactic Cold Clumps project. We report the detection of 11 hot corino sources, which exhibit compact emissions from warm and abundant COMs, among 56 Class 0/I protostellar cores. All of the hot corino sources discovered are likely Class 0, and their sizes of the warm region (>100 K) are comparable to 100 au. The luminosity of the hot corino sources exhibits positive correlations with the total number of methanol and the extent of its emissions. Such correlations are consistent with the thermal desorption picture for the presence of hot corinos and suggest that the lower-luminosity (Class 0) sources likely have a smaller region with COM emissions. With the same sample selection method and detection criteria being applied, the detection rates of the warm methanol in the Orion cloud (15/37) and the Perseus cloud (28/50) are statistically similar when the cloud distances and the limited sample size are considered. Observing the same set of COM transitions will bring a more informative comparison between the cloud properties.