The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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AKARI/IRC spectroscopic survey for interstellar ice study

  • Kim, Jaeyeong (School of Space Research, Kyung Hee University) ;
  • Lee, Jeong-Eun (School of Space Research, Kyung Hee University) ;
  • Kim, Il-Seok (Space Environment Laboratory) ;
  • Aikawa, Yuri (Department of Astronomy, Graduate School of Science, The University of Tokyo) ;
  • Jeong, Woong-Seob (Korea Astronomy and Space Science Institute) ;
  • Lee, Ho-Gyu (Korea Astronomy and Space Science Institute) ;
  • Noble, Jennifer A. (Laboratoire de Physique des Lasers, Atomes et Molecules, The University de Lille) ;
  • Dunham, Michael M. (Department of Astronomy, University of Virginia)
  • Published : 2019.04.10
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Abstract

Ices in interstellar environments are well traced mostly by their absorption features in the near- to mid-infrared spectrum. The infrared camera (IRC) aboard AKARI provides us the near-infrared spectroscopic data which cover $2.5-5.0{\mu}m$ with a spectral resolution of R ~ 120. Our AKARI spectroscopic survey of young stellar objects (YSOs), including low-luminosity protostars and background stars, revealed the absorption features of $H_2O$, $CO_2$, CO, and XCN ice components. We present near-infrared spectra of the observed targets and compare their ice abundances with those previously derived from various YSOs and the background stars behind dense molecular clouds and cores. In addition, we suggest possible science cases for SPHEREx, NASA's new near-infrared space observatory, based on the results from our AKARI IRC spectroscopic study.

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