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Neutral atomic and molecular clouds and star formation in the outer Carina arm
Geumsook Park, Bon-Chul Koo, Kee-Tae Kim +1
We present a comprehensive investigation of HI (super)clouds, molecular clouds (MCs), and star formation in the Carina spiral arm of the outer Galaxy. Utilizing HI4PI and CfA CO su…
Near-Infrared Spectroscopy of Dense Ejecta Knots in the Outer Eastern Area of the Cassiopeia A Supernova Remnant
Bon-Chul Koo, Yong-Hyun Lee, Jae-Joon Lee +1
The Cassiopeia A supernova remnant has a complex structure, manifesting the multidimensional nature of core-collapse supernova explosions. To further understand this, we carried ou…
He abundance of Dense Circumstellar Clumps in the Cassiopeia A Supernova Remnant
Bon-Chul Koo, Dongkok Kim, Sung-Chul Yoon +1
We report on the result of He abundance analysis of dense circumstellar clumps in the young supernova remnant Cassiopeia A. These clumps, which are called quasi-stationary flocculi…