Planetary and Space Science, vol. 165, pp. 281–292

Authors:

  • 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 Mori
  • Yoshikazu 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

URL:

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 $\sim$1.98$\sim$deg$^2$ at 2Hz. 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 $+10$mag in the V-band, corresponding to about $8.3\times10^-2$ to $3.3\times10^-4$g in mass. The present magnitude distributions we obtained are well explained by a single power-law luminosity function with a slope parameter $r=3.1\pm 0.4$ and a meteor rate $łog_10N0=-5.5\pm 0.5$. 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.