The Discovery of 25 um Interstellar Methanol

We report the detection of methanol in the torsional band near 25 um towards a massive protostar, five Class 0 and Class I low mass protostars, and eleven Class II protoplanetary disks in JWST/MIRI archival data. The detection of this methanol feature through three stages of protostellar evolution suggests that this molecule has been directly inherited from the icy, natal cloud phase. The access to this methanol band will enable further exploration of how complex organic molecules could be inherited from the earliest protostellar disks and survive to the central regions of planet forming disks, where future planets will reside.本研究利用詹姆斯·韦伯太空望远镜（James Webb Space Telescope, JWST）/中红外仪器（Mid-Infrared Instrument, MIRI）的存档数据，在1颗大质量原恒星、5颗0型（Class 0）与I型（Class I）低质量原恒星，以及11颗II型（Class II）原行星盘的视线方向上，探测到25微米附近扭转动带（torsional band）处的甲醇特征。在原恒星演化的三个阶段均检出该甲醇信号，表明该分子直接继承自富含冰质的原生云团阶段。对该甲醇转动带的观测，将助力进一步探索复杂有机分子如何从早期原行星盘中继承留存，并得以在未来行星所在的行星形成盘中心区域存续。

搜集汇总

背景与挑战

背景概述

该数据集报告了使用JWST/MIRI存档数据在近25微米波长处检测到星际甲醇的发现，覆盖大质量原恒星、低质量原恒星和多个原行星盘。这一发现表明甲醇可能从原恒星演化的早期冰相云层继承，为研究复杂有机分子在行星形成过程中的存活和演化提供了新途径。