Other
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf.1032t&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.1032
Other
Scientific paper
When the disk of Venus is in proximity of the solar limb, the atmosphere of the planet is revealed by a thin arc of light known as "aureole" or "Lomonosov's arc". The refraction of sunlight is responsible for this phenomena, which has shown a certain degree of variability from one transit to the other. The event of 2004 was the first one observed with modern electronic devices, so it was possible to derive a photometry of the arc. Our results indicate the presence of latitude-dependent signatures, as for example a bright polar spot. A simple refraction model reproducing the observations is capable of providing useful physical parameters concerning the mesosphere of the planet. A better focused observational campaign for the transit of 2012 is proposed to provide data of higher quality.
Sicardy Bruno
Tanga Paolo
Widemann Th.
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