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A Deep Near-Infrared [Fe II]+[Si I] Emission Line Image of the Supernova Remnant Cassiopeia A
Bon-Chul Koo, Hyun-Jeong Kim, Yong-Hyun Lee +4
We present a long-exposure (~10 hr) image of the supernova (SN) remnant Cassiopeia A (Cas A) obtained with the UKIRT 3.8-m telescope using a narrow band filter centered at 1.644 um…
A Parsec-scale Bipolar H Outflow in the Massive Star Forming Infrared Dark Cloud Core MSXDC G053.11+00.05 MM1
Hyun-Jeong Kim, Bon-Chul Koo, Tae-Soo Pyo +1
We present a parsec-scale molecular hydrogen (H 1-0 S(1) at 2.12~\micron) outflow discovered from the UKIRT Widefield Infrared Survey for H. The outflow is located in the i…
Galactic HCO+ Absorption toward Compact Extragalactic Radio Sources
Geumsook Park, Bon-Chul Koo, Kee-Tae Kim +2
As part of the search for the "dark molecular gas (DMG)," we report on the results of HCO J = 1-0 absorption observations toward nine bright extragalactic millimeter wave conti…
High-resolution near-IR Spectral mapping with H and [Fe II] lines of Multiple Outflows around LkH 234
Heeyoung Oh, Tae-Soo Pyo, Bon-Chul Koo +11
We present a high-resolution, near-IR spectroscopic study of multiple outflows in the LkH 234 star formation region using the Immersion GRating INfrared Spectrometer (IGRINS). S…