Luminosity function of faint sporadic meteors measured with a wide-field CMOS mosaic camera Tomo-e PM

Ryou Ohsawa, Shigeyuki Sako, Yuki Sarugaku, Fumihiko Usui, Takafumi Ootsubo, Yasunori Fujiwara, Mikiya Sato, Toshihiro Kasuga, Ko Arimatsu, Jun ichi Watanabe, Mamoru Doi, Naoto Kobayashi, Hidenori Takahashi, Kentaro Motohara, Tomoki Morokuma, Masahiro Konishi, Tsutomu Aoki, Takao Soyano, Ken'ichi Tarusawa, Yuki MoriYoshikazu Nakada, Makoto Ichiki, Noriaki Arima, Yuto Kojima, Masahiro Morita, Toshikazu Shigeyama, Yoshifusa Ita, Mitsuru Kokubo, Kazuma Mitsuda, Hiroyuki Maehara, Nozomu Tominaga, Takuya Yamashita, Shiro Ikeda, Mikio Morii, Seitaro Urakawa, Shin ichiro Okumura, Makoto Yoshikawa

Research output: Contribution to journalArticle

Abstract

Imaging observations of faint meteors were carried out on April 11 and 14, 2016 with a wide-field CMOS mosaic camera, Tomo-e PM, mounted on the 105-cm Schmidt telescope at Kiso Observatory, the University of Tokyo. Tomo-e PM, which is a prototype model of Tomo-e Gozen, can monitor a sky of ∼1.98deg2 at 2 Hz. The numbers of detected meteors are 1514 and 706 on April 11 and 14, respectively. The detected meteors are attributed to sporadic meteors. Their absolute magnitudes range from +4 to +10mag in the V-band, corresponding to about 8.3×10−2 to 3.3×10−4g in mass. The present magnitude distributions we obtained are well explained by a single power-law luminosity function with a slope parameter r=3.1±0.4 and a meteor rate log10N0=−5.5±0.5. The results demonstrate a high performance of telescopic observations with a wide-field video camera to constrain the luminosity function of faint meteors. The performance of Tomo-e Gozenis about two times higher than that of Tomo-e PM. A survey with Tomo-e Gozenwill provide a more robust measurement of the luminosity function.

Original languageEnglish
Pages (from-to)281-292
Number of pages12
JournalPlanetary and Space Science
Volume165
DOIs
Publication statusPublished - 2019 Jan

Keywords

  • Interplanetary medium
  • Meteoroids
  • Meteors

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Ohsawa, R., Sako, S., Sarugaku, Y., Usui, F., Ootsubo, T., Fujiwara, Y., Sato, M., Kasuga, T., Arimatsu, K., Watanabe, J. I., Doi, M., Kobayashi, N., Takahashi, H., Motohara, K., Morokuma, T., Konishi, M., Aoki, T., Soyano, T., Tarusawa, K., ... Yoshikawa, M. (2019). Luminosity function of faint sporadic meteors measured with a wide-field CMOS mosaic camera Tomo-e PM. Planetary and Space Science, 165, 281-292. https://doi.org/10.1016/j.pss.2018.09.006