Photometry of Io and Europa at the Crimean Astrophysical Observatory and reasons for differences between ground-based and space observations

Photometric observations of Jupiter’s moons Io and Europa in the spectral band V have been made at the Crimean Astrophysical Observatory for four years in order to construct their light curves reduced to a Solar phase angle of 6°. Comparison of these data with other ground-based observations shows g...

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Bibliographic Details
Published in:Bulletin of the Crimean Astrophysical Observatory 2011-06, Vol.107 (1), p.113-121
Main Authors: Abramenko, A. N., Baida, G. V., Zakrevskii, A. V., Karachkina, L. G., Prokof’eva-Mikhailovskaya, V. V., Sergeeva, E. A.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics
Astrophysics and Cosmology
Cosmology
Jupiter
Magnetic fields
Moons
Physics
Physics and Astronomy
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Summary:Photometric observations of Jupiter’s moons Io and Europa in the spectral band V have been made at the Crimean Astrophysical Observatory for four years in order to construct their light curves reduced to a Solar phase angle of 6°. Comparison of these data with other ground-based observations shows good agreement. This study confirms why the moons that are close to Jupiter have a brighter leading hemisphere. The trailing hemispheres of Io and Europa, which are located in the rapidly rotating magnetic field of Jupiter, are exposed to bombardment by charged particles of the magnetic field. Leaving out of consideration the differences in brightness between the two hemispheres results in serious discrepancies between the space and ground-based photometry data.
ISSN:0190-2717
1934-7863
DOI:10.3103/S0190271711010013