论文标题
IRA中的化学成分16562--3959高质量恒星形成区域
Chemical composition in the IRAS 16562--3959 high-mass star-forming region
论文作者
论文摘要
我们已经分析了Atacama大毫米/亚毫米阵列（ALMA）周期2频段6的数据朝G345.4938+01.4677巨大的年轻原生物对象（G345.5+1.47 myso）在IRAS 16562 16562----3959高量的Sims Ans Ansular-$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ \ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $”我们在空间上解析了三个突出的分子发射核心 organic molecules (COMs), such as (CH$_{3}$)$_{2}$CO and CH$_{3}$OCHO, have been detected toward the positions of Core B and Core C, while nitrogen-bearing species, CH$_{3}$CN, HC$_{3}$N and its $^{13}$C isotopologues, have been检测到所有核心。因此，在电离区域的扩展运动产生的冲击中得到了增强。
We have analyzed the Atacama Large Millimeter/submillimeter Array (ALMA) cycle 2 data of band 6 toward the G345.4938+01.4677 massive young protostellar object (G345.5+1.47 MYSO) in the IRAS 16562--3959 high-mass star-forming region with an angular resolution of $\sim 0.3"$, corresponding to $\sim 760$ au. We spatially resolve the central region which consists of three prominent molecular emission cores. A hypercompact (HC) H$_{\rm {II}}$ region (Core A) and two molecule-rich cores (Core B and Core C) are identified using the moment zero images of the H30$α$ line and a CH$_{3}$OH line, respectively. Various oxygen-bearing complex organic molecules (COMs), such as (CH$_{3}$)$_{2}$CO and CH$_{3}$OCHO, have been detected toward the positions of Core B and Core C, while nitrogen-bearing species, CH$_{3}$CN, HC$_{3}$N and its $^{13}$C isotopologues, have been detected toward all of the cores. We discuss the formation mechanisms of H$_{2}$CO by comparing the spatial distribution of C$^{18}$O with that of H$_{2}$CO. The $^{33}$SO emission, on the other hand, shows a ring-like structure surrounding Core A, and it peaks on the outer edge of the H30$α$ emission region. These results imply that SO is enhanced in a shock produced by the expanding motion of the ionized region.
