Luminosity function of faint sporadic meteors measured with a wide-field CMOS mosaic camera Tomo-e PM
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.
- Publication:
-
Planetary and Space Science
- Pub Date:
- January 2019
- DOI:
- 10.1016/j.pss.2018.09.006
- arXiv:
- arXiv:1809.08816
- Bibcode:
- 2019P&SS..165..281O
- Keywords:
-
- Meteors;
- Meteoroids;
- Interplanetary medium;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 18 pages, 13 figures, accepted for publication in Planetary and Space Science