Assistant Professor OHSAWA, Ryou
Research Field
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Optical and Infrared Astronomy, Physics of Interstellar Medium, Planetary Science
Degree
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Doctor of Science (Graduate School of Science, The University of Tokyo)
Summary of Research
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Measuring the distance to celestial objects is essential in observational astronomy. JASMINE is an infrared astrometry satellite that measures the distances to stars in the galactic center region, heavily obscured by dust, through observations in the infrared. I am in charge of developing algorithms and software to analyze astrometry data. Besides the JASMINE project, I have investigated the formation and evolution of circumstellar dust and have been involved in observations of small solar system bodies.
Research Achievements or Papers
- Development of a Tracklet Extraction Engine, Ohsawa, R., Journal of Space Science Informatics Japan, 2021, 11, 1-10, 10.20637/00048400, https://ui.adsabs.harvard.edu/abs/2021arXiv210909064O
- Relationship between Radar Cross Section and Optical Magnitude based on Radar and Optical Simultaneous Observations of Faint Meteors, Ohsawa, R., Hirota, A., Morita, K., Abe, S., Kastinen, D., Kero, J., Szasz, C., Fujiwara, Y., Nakamura, T., Nishimura, K., et al., Planetary and Space Science, 2020, 194, 105011, 10.1016/j.pss.2020.105011, http://adsabs.harvard.edu/abs/2020P&SS..19405011O
- Luminosity function of faint sporadic meteors measured with a wide-field CMOS mosaic camera Tomo-e PM, Ohsawa, R., Sako, S., Sarugaku, Y., Usui, F., Ootsubo, T., Fujiwara, Y., Sato, M., Kasuga, T., Arimatsu, K., Watanabe, J., et al., Planetary and Space Science, 2019, 165, 281–292, 10.1016/j.pss.2018.09.006, https://ui.adsabs.harvard.edu/abs/2019P&SS..165..281O/abstract
- “Slow-scanning” in Ground-based Mid-infrared Observations, Ohsawa, R., Sako, S., Miyata, T., Kamizuka, T., Okada, K., Mori, K., Uchiyama, M. S., Yamaguchi, J., Fujiyoshi, T., Morii, M., et al., The Astrophysical Journal, 2018, 857, 37, 10.3847/1538-4357/aab6ae, https://ui.adsabs.harvard.edu/abs/2018ApJ…857…37O/abstract
- AKARI/IRC Near-Infrared Spectral Atlas of Galactic Planetary Nebulae, Ohsawa, R., Onaka, T., Sakon, I., Matsuura, M., Kaneda, H., The Astronomical Journal, 2016, 151, 93, 10.3847/0004-6256/151/4/93, https://ui.adsabs.harvard.edu/abs/2016AJ....151…93O/abstract
Academic Society
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The Astronomical Society of Japan, The Japanese Society for Planetary Science
Other Activity
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Lecturer at Konan University (2021−)
Seminars for high-school students at The University of Tokyo (2016−2020)
Lecturer at Asahi Culture Center (2017, 2019)
Lecturer at NHK Culture Center (2020)
Web Page
- ryou.ohsawa[at]nao.ac.jp
(In the mailing address, replace [at] with @)