[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5303/PKAS.2017.32.1.105

ICE ABSORPTION FEATURES IN NIR SPECTRA OF GALACTIC OBJECTS

Mori, Tamami I. (Department of Astronomy, Graduate School of Science, The University of Tokyo)
Onaka, Takashi (Department of Astronomy, Graduate School of Science, The University of Tokyo)
Sakon, Itsuki (Department of Astronomy, Graduate School of Science, The University of Tokyo)
Ohsawa, Ryou (Department of Astronomy, Graduate School of Science, The University of Tokyo)
Kaneda, Hidehiro (Graduate School of Science, Nagoya University)
Yamagishi, Mitsuyoshi (Graduate School of Science, Nagoya University)
Okada, Yoko (I. Physikalisches Institut, Universit at zu Koln)
Tanaka, Masahiro (Astronomical Institute, Graduate School of Science, Tohoku University)
Shimonishi, Takashi (Department of Earth and Planetary Sciences, Graduate School of Science, Kobe University)

Publication Information

Publications of The Korean Astronomical Society / v.32, no.1, 2017 , pp. 105-107 More about this Journal

Abstract

We present results of AKARI/IRC near-infrared (NIR) slit-spectroscopy ( $2.5-5.0{\mu}m$ , R ~ 100) of Galactic sources, focusing on ice absorption features. We investigate the abundance of $H_2O$ and $CO_2$ ices and other ice species (CO and XCN ices) along lines of sight towards Galactic H $\small{II}$ regions, massive YSOs, and infrared diffuse sources. Even among those different kinds of astronomical objects, the abundance ratio of $CO_2$ to $H_2O$ ices does not vary significantly, suggesting that the pathway to $CO_2$ ice formation driven by UV irradiation is not effective at least among the present targets.

Keywords

astrochemistry; ISM: molecules; Milky Way; infrared: ISM;

Citations & Related Records

Reference

1	Gibb, E. L., Whittet, D. C. B., Boogert, A. C. A., Tielens, A. G. G. M., 2004, Interstellar Ice: The Infrared Space Observatory Legacy, ApJS, 151, 35 DOI
2	Mori, T. I., Onaka, T., Sakon, I., Ishihara, D., Shimonishi, T., Ohsawa, R., & Bell, A. C., 2014, Observational Studieson the Near-infrared Unidentied Emission Bands in Galactic HII Regions, ApJ, 784, 53 DOI
3	Murakami, H., Baba, H., Barthel, P., et al., 2007, The Infrared Astronomical Mission AKARI, 2007, PASJ, 59, S369 DOI
4	Onaka, T., Matsuhara, H., Wada, T., et al., 2007, The Infrared Camera (IRC) for AKARI - Design and Imaging Performance, PASJ, 59, S401 DOI
5	Onaka, T., Mori, T. I., Ohsawa, R., et al., 2016, Processing of Interstellar Medium as Divulged by AKARI, this volume
6	Gerakines, P. A., Whittet, D. C. B., Ehrenfreund, P, et al., 1999, Observations of Solid Carbon Dioxide in Molecular Clouds with the Infrared Space Observatory, ApJ, 522, 357 DOI
7	Rygl, K. L. J., Brunthaler, A., Sanna, A., et al., 2012, Parallaxes and proper motions of interstellar masers toward the Cygnus X star-forming complex. I. Membership of the Cygnus X region, A&A, 539, 79 DOI