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VERSION:2.0
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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20090121T000000
DTEND;TZID=Atlantic/Canary:20090121T010000
UID:iactalks-49
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/49
CREATED:2009-01-21T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Organic grains in cometary comae
DESCRIPTION:Organic grains in cometary comae\nDr. Gian Paolo Tozzi\n\nComet
 s may have played an important role in depositing the organic matter that,
  between 4,6 and 3,6 billion of years ago, allowed the formation of life o
 n the primordial Earth. Nowadays, many complex organic molecules are routi
 nely observed in the gaseous component of the comae by radio and near-IR o
 bservations. However a large quantity of organic matter may be under the f
 orm of solid, either as organic grains or organics embedded in silicate gr
 ains. The Giotto mission to the 1P/Halley comet revealed for the first tim
 e the in-situ presence of organic grains, that accounted for almost 50% of
  the mass of organic matter in its coma. Remote detection of these organic
  grains in other comets is very difficult because they rapidly sublimate u
 nder the solar radiation and their spectroscopic signatures are hidden wit
 hin those of the refractory cometary dust.  In this talk I will give a sho
 rt review on the organic matter in comets, I will describe a method for de
 tecting organic grains in comets and I will present recent results.
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