Carbonyl sulfide (OCS) is one of the sulfur-bearing molecules detected in different astronomical environments, including comets. The present-day sulfur chemistry in comets may reveal much about the origin of these ices and their subsequent processing history. Cometary sulfur molecules such as H 2 S, H 2 CS, SO 2 , SO, CS, CS 2 , S 2 , and NS have been detected in many comets. However, OCS, the only sulfur-bearing species with fluorescence emission lines at infrared wavelengths, is under-represented in comet volatile studies, having been reported in only six comets so far. We targeted OCS with the NASA Infrared Telescope Facility in comets 46P/Wirtanen, 21P/Giacobini–Zinner, and C/2015 ER61 (PanSTARRS) in 2017–2018 using the high-resolution iSHELL spectrograph, and in C/2002 T7 (LINEAR) in 2004 using the heritage CSHELL spectrograph. In comet C/2015 ER61, the OCS abundance was similar to those measured in bright comets such as comets C...

中文翻译：

---

羰基硫（OCS）：在彗星C / 2002 T7（LINEAR），C / 2015 ER61（PanSTARRS）和21P / Giacobini-Zinner中的检出率和46P / Wirtanen中的严格上限

羰基硫（OCS）是在不同的天文环境（包括彗星）中检测到的含硫分子之一。当今彗星中的硫化学物质可能揭示了这些冰的起源及其随后的加工历史。已经在许多彗星中检测到诸如H 2 S，H 2 CS，SO 2，SO，CS，CS 2，S 2和NS的彗星硫分子。然而，OCS是唯一在红外波长具有荧光发射线的含硫物质，在彗星挥发性研究中的代表性不足，到目前为止，只有六颗彗星被报道。我们使用高分辨率iSHELL光谱仪在2017-2018年将46P / Wirtanen，21P / Giacobini–Zinner和C / 2015 ER61（PanSTARRS）彗星与美国国家航空航天局（NASA）红外望远镜设施作为OCS的目标，使用的是高分辨率iSHELL光谱仪，以及C / 2002 T7（LINEAR）在2004年使用了传统的CSHELL光谱仪。