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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…
Ice features of low-luminosity protostars in near-infrared spectra of AKARI/IRC
Jaeyeong Kim, Jeong-Eun Lee, Woong-Seob Jeong +8
We present near-infrared spectra of three low-luminosity protostars and one background star in the Perseus molecular cloud, acquired using the Infrared Camera (IRC) onboard the \te…
Observational Properties of Type Ib/c Supernova Progenitors in Binary Systems
Hyun-Jeong Kim, Sung-Chul Yoon, Bon-Chul Koo
In several recent observational studies on Type Ib/c supernovae (SNe Ib/c), the inferred ejecta masses have a peak value of 2.0 -- 4.0 , in favor of the binary scenario fo…
[Fe II] 1.64 um Imaging Observations of the Outflow Features around Ultracompact H II Regions in the 1st Galactic Quadrant
Jong-Ho Shinn, Kee-Tae Kim, Jae-Joon Lee +7
We present [Fe II] 1.644 um features around ultracompact H II regions (UCHIIs) found on a quest for the "footprint" outflow features of UCHIIs---the feature produced by the outflow…
[Fe II] 1.64 um Features of Jets and Outflows from Young Stellar Objects in the Carina Nebula
Jong-Ho Shinn, Tae-Soo Pyo, Jae-Joon Lee +11
We present [Fe II] 1.64 μm imaging observations for jets and outflows from young stellar objects (YSOs) over the northern part (~ 24'x45') of the Carina Nebula, a massive star form…