W51 IRS2中热抑制致密结构的物理化学性质研究
Study on the Physical and Chemical Properties of a Thermally Inhibited Dense Structure in W51 IRS2
唐孟尧 1阮梦 2陈兴鹏 2杨蝴蝶 2李连登2
作者信息
- 1. 楚雄师范学院 天体物理研究所,云南 楚雄 675000;楚雄师范学院 物理与电子科学学院,云南 楚雄 675000
- 2. 楚雄师范学院 物理与电子科学学院,云南 楚雄 675000
- 折叠
摘要
本文通过分析和处理ALMA望远镜对大质量恒星形成区W51 IRS 2区域的超高分辨率(0.028角秒)观测数据,首次观测到了一个未发生碎裂的超致密团块状结构CE 1.其质量大于13倍太阳质量,密度高于107.在CEI中探测到了CH3CN分子的振动态(v 8=1)和转动态(v=0)总计16条跃迁谱线,并计算了CH3CN分子的参数.通过金斯分析,发现CE1内部的实际温度应该高于400 K,在其内部并未观测到明显的恒星形成活动,所有研究结果表明CE1极有可能是一个处于演化极早期阶段的大质量恒星"胚胎".
Abstract
This work analyzes and processes high-resolution(0.028'')observation data of the W51 IRS2 region,a massive star-forming region,obtained by the ALMA.For the first time,an unfragmented,ultra-dense clump-like structure called CE1 was observed,with a mass greater than 13 solar masses and a density higher than 107.Vibrational(v8=1)and rotational(v=0)transitions of CH3CN molecule were detected in a total of 16 spectral transitions,and the parameters of CH3CN were calculated.From Jeans analysis,it was found that the temperature inside CE 1 should be higher than 400 K,and no obvious star formation activity was observed in-side.All the research results suggest that CE 1 is highly possible an"embryo"in a very early evolutionary stage of massive star formation.
关键词
大质量恒星形成/星际介质/分子谱线Key words
massive star formation/interstellar medium/molecular spectrum引用本文复制引用
基金项目
大学生创新创业训练计划(202211391031)
国家自然科学基金(12203011)
出版年
2024
NETL
NSTL
万方数据