Page 117 - Abstract book - TJSSF-2020

Thailand – Japan Student Science Fair 2020 (TJ-SSF 2020)
“Seeding Innovations through Fostering Thailand – Japan Youth Friendship”

Spectroscopic Observation of Meteors

Yui Sato , Azumi Sato , Yuki kato
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Adviser: Shigehiro Hisamitsu

Miyagi Prefecture Furukawa Reimei High School
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Abstract

This study is to make spectroscopic observations of meteors from the ground and infer the elements
contained in their luminescence by shooting with a digital single-lens reflex camera having diffraction
grating. We have spent five years shooting and analyzing 48 meteors. As a result, we discovered the
elements of their luminescence came from their bodies and the Earth’s atmosphere. We also discovered
some characteristics of each meteor shower. We confirmed the Gemini meteor shower contains less
sodium than other meteor showers. It means the parent meteor body also contains less sodium and the
longer time has passed since its formation. We found luminescence that contained oxygen atom (557.73
nm) at the Perseus and the Orion meteor showers. It is called “oxygen forbidden line” and the light is
emitted only under limited conditions (with higher energy and less oxygen than that on the ground). To
clarify the lighting conditions for oxygen forbidden line, we needed to measure the emission speed of
the meteors and the ground speed. Therefore, we observed meteors from more than one point at the
same time and inferred the speeds from the mechanism of the light emissions.
Keywords: meteor, spectroscopic observation, diffraction grating, oxygen forbidden line

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