Seminar Announcement -OATS-DAUT SEMINAR - Wednesday, January 9th, at 12:00 noon (Villa Bazzoni)

[Gabriella Schiulaz]

I announce you next OATS-DAUT seminar:

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                 OATS-DAUT SEMINAR 
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Speaker: Marco Fulle (INAF/OATS) 

Title: Iron tails 

Date: Wednesday, January 9th, 2008 
Time: 12:00 
Venue: Villa Bazzoni (via Bazzoni, 2)

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Abstract: 

In January 2007, at the heliocentric distance r < 0.3 Astronomical Units, comet McNaught 2006P1 became the brightest comet since C/Ikeya-Seki 1965S1 and was continuously monitored by space-based solar observatories. An arch-like tail observed by the Heliospheric Imager aboard the STEREO spacecraft is the first ever detected tail composed of neutral Fe atoms, providing the first estimate of the Fe lifetime, which results in 4.1 ± 0.4 104 s at r = 0.25 AU, in agreement with theoretical predictions of photo-ionization lifetime. The expected dust temperature is inconsistent with iron sublimation, suggesting that Fe atoms are coming from troilite evaporation, in agreement with Stardust samples which contain most iron in such sulfides. 
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contact: Marco Fulle (OATS) 



For additional information on OAT seminars see:
http://adlibitum.oats.inaf.it/seminari/

Gabriella Schiulaz
segreteria OAT
Phone: 040-3199241
schiulaz at oats.inaf.it
segreteria at oats.inaf.it