The physical and chemical structure of continuum sources in Orion KL

Fang-Chun Liu^1*, Yi-Jehng Kuan¹, Ya-Wen Yu¹, Yo-Ling Chuang¹

¹Earth Sciences, National Taiwan Normal University, Taipei, Taiwan

* Presenter:Fang-Chun Liu, email:fcliu@ntnu.edu.tw

Orion Kleinmann–Low (Orion KL) hot molecular core, the nearest massive star-forming region to Earth, is one of the richest molecular reservoirs in Milky Way. With the Atacama Large Millimeter/submillimeter Array (ALMA) high-angular resolution observations, we investigate the millimeter/submillimeter continuum emission of Orion KL. In this study, twenty-four separate continuum sources are identified. Moreover, the physical and chemical properties of each individual continuum, such as the velocity, temperature and mass, and chemical abundances of nitrogen-/oxygen-bearing molecules, are also inferred based on the continuum and spectral emission observed. Marked correlations between certain physical and chemical parameters thus derived are evident and may be attributed to different evolutionary stages in these continuum sources.

Keywords: Star-forming region, Orion KL, ALMA