2025 天文年會 (ASROC Annual Meeting)

The Highly Collimated SiO Protostellar Jet from the Class 0 Protostar HH212

Not scheduled

20m

International Conference Hall 圓形國際會議廳 (College of Management, National Formosa University 國立虎尾科技大學第三校區文理暨管理大樓)

Board: 25

Poster Poster-SF

Speaker

YU-SYUAN TU (中研院天文及天文物理研究所(ASIAA))

Description

HH212 is a nearby protostellar jet driven by a Class 0 protostar (IRAS 05413–0104), exhibiting a symmetric structure with knots. The Atacama Large Millimeter/submillimeter Array (ALMA) has observed the SiO J = 16–15 line in Band 9 with a resolution of 0.088″ × 0.067″, and the J = 8–7 line in Band 7 with a higher resolution of 0.022″ × 0.020″. By comparing the intensities of the two lines—after convolving them to the same resolution—it is possible to estimate the average temperature and density of the collimated jets. Assuming uniform physical conditions, a simple model is developed to describe the jets and to compare with the observed line ratios. This approach provides relatively direct insights into the physical properties of the inner jets, offering a deeper understanding of the innermost structures of a protostellar system.