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Near‐IR imaging observations of the cometary impact into Jupiter
Author(s) -
Takeuchi Satoru,
Hasegawa Hitoshi,
Watanabe Junichi,
Yamashita Takuya,
Abe Masanao,
Hirota Yuka,
Nishihara Eiji,
Okumura Shiichiro,
Mori Atsushi
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl01015
Subject(s) - comet , jupiter (rocket family) , plume , physics , infrared , photometry (optics) , comet dust , astronomy , observatory , astrobiology , radiation , shock wave , astrophysics , atmospheric sciences , interplanetary dust cloud , solar system , meteorology , optics , stars , space shuttle , thermodynamics
We carried out observations of Jupiter during the impact of comet Shoemaker‐Levy 9 with Jupiter at the Okayama Astrophysical Observatory with a near‐infrared camera, OASIS. In this paper we report on result of absolute photometry of radiation from the impacts of fragment C,D and K at 2.35 µ m and discues on the impact phenomena. Lightcurve of the K impact event had four stages. We interpret the first as flash from the comet entry and the second as radiation from shock wave and/or high temperature plume itself, seen directly by Earth. The third, in which rapid increment of the infrared radiation was observed, may be caused by the increase of optical depth due to dust grain formation in the expanding and cooling plume. The fourth shows slowly decrease of the flux, which may be re‐entry phenomena of the plume.