SPECTRAL OBSERVATIONS OF IMPACT DARK SPOTS

Citation
B. Suzuki et al., SPECTRAL OBSERVATIONS OF IMPACT DARK SPOTS, Earth, moon, and planets, 66(1), 1994, pp. 19-27
Citations number
5
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics","Geosciences, Interdisciplinary
Journal title
ISSN journal
0167-9295
Volume
66
Issue
1
Year of publication
1994
Pages
19 - 27
Database
ISI
SICI code
0167-9295(1994)66:1<19:SOOIDS>2.0.ZU;2-B
Abstract
We carried out a spectral observation of traces of the comet impacts w ithin the wavelength region between 440 and 830 nm. Three dark spots o f fragments K, E, and G impact sites were investigated. The spectrum o f these dark spots shows no special emission or absorption lines in th is observation. The global spectral feature resembles that of Jovian z one cloud rather than that of the belt. While the continuum reflectivi ty of the dark spots of K and E sites is less than 0.42 at 600 nm, tha t of the G site is 0.33. These values should be interpreted as an uppe r limits because of the influence of atmospheric seeing. The equivalen t width of the absorption lines at the K sites is also derived. Both t he continuum reflectivity and the equivalent width of the dark spots a re smaller than those of any Jovian zonal cloud. This indicates that t he dark spots ale low-albedo cloud formed at the upper atmosphere.