Luminosity function of faint sporadic meteors measured with a wide-field CMOS mosaic camera Tomo-e PM
Planetary and Space Science, vol. 165, pp. 281–292
著者:
- 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.