摘要
使用紫金山天文台青海观测站13.7 m毫米波望远镜进行的^(12)CO(J=1-0,J为角动量量子数)分子谱线的高灵敏度、高分辨率成图观测,首次发现NGC 2264 Cone的两个子区域Spokes和Cone(C)存在总速度宽度约60 km·s^(-1)的极端高速气体.将探测到的外向流的速度划分为3个速度成分(低速、高速、极端高速),以揭示分子外向流的形态和分布的变化.极端高速的^(12)CO发射显示出多个蓝瓣和红瓣,随着气体速度的增加,蓝瓣和红瓣之间的距离明显增大,呈现向外运动的趋势.计算了Cone区域不同速度外向流的相关物理量参数,结果显示低速气体拥有最多的能量和光度.通过分子外向流的总能量和总光度与分子云的湍动能量和光度进行比较发现Cone区域的分子外向流可能是影响分子云湍动的重要因素.
Using the high-sensitivity and high-resolution observations of the^(12)CO(J=1−0,J is angular-momentum quantum number)molecular line observed by the Qinghai Observatory of Purple Mountain Observatory with the 13.7 meter telescope,extremely high velocity molecular outflows with total velocity width up to~60 km·s^(-1)were detected for the first time in the two sub-regions,Spokes and Cone(C),of the NGC 2264 Cone.The detected outflow velocities were divided into three components(low,high and extremely high velocity)to reveal changes in the morphology and distribution of the molecular outflows.The^(12)CO emission of extremely high velocity shows multiple blueshifted and redshifted lobes.As the gas velocities increase,the distances between the lobes increase significantly,indicating an outward movement.The physical parameters of the outflows at different velocities in the Cone region were calculated,and the results showed that low velocity gas possesses the most energy and luminosity.The comparison of the total energy and luminosity of the outflow with the turbulent energy and luminosity of the molecular cloud suggests that the outflows may be a significant factor in influencing the turbulence in the Cone region.
作者
刘馨嵘
李晶晶
刘德剑
孔德沄
李英杰
林泽昊
郝超杰
卞帅博
LIU Xin-rong;LI Jing-jing;LIU De-jian;KONG De-yun;LI Ying-jie;LIN Ze-hao;HAO Chao-jie;BIAN Shuai-bo(Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023;School of Astronomy and Space Sciences,University of Science and Technology of China,Hefei 230026)
出处
《天文学报》
北大核心
2025年第3期126-142,共17页
Acta Astronomica Sinica
基金
国家自然科学基金项目(11933011)资助。
