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UID:69@osups.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20260326T110000
DTEND;TZID=Europe/Paris:20260326T120000
DTSTAMP:20260304T151031Z
URL:https://osups.universite-paris-saclay.fr/calendrier/laboratory-experim
 ents-to-understand-solar-system-small-bodies-composition-from-infrared-rem
 ote-sensing-to-chemical-analysis/
SUMMARY:Laboratory experiments to understand solar system small bodies comp
 osition: from infrared remote sensing to chemical analysis
DESCRIPTION:par Olivier Poch (IPAG)\n\nAbstract :\n\nSolar system small bod
 ies were the first objects to accrete inside the protoplanetary disk\, so 
 they give insights into its composition and structure. The smallest and da
 rkest small bodies (among comets\, P/D/X/C/B-type asteroids etc.) are made
  of the remnant protoplanetary disk dust\, which has been more or less alt
 ered since their accretion depending on the object. Why do these objects h
 ave such a low albedo? Why do they exhibit diverse spectra at visible and 
 infrared wavelengths? And how to infer their composition via infrared remo
 te sensing?\nI will present laboratory experiments providing some answers 
 to these questions\, via the production of granular samples made of sub-mi
 crometer-sized grains analogue to these low albedo small bodies\, and the 
 measurement of their reflectance spectra. The optical separation of sub-mi
 crometer-sized grains seems to be a major parameter controlling the optica
 l properties of these objects.\nIn addition\, pieces of some of these obje
 cts\, meteorites or samples returned by space missions\, can be directly a
 nalyzed for their chemical composition in the laboratory. I will present a
 nalyses aiming at identifying the nitrogen carrier phases (organic matter\
 , ammonium) in carbonaceous chondrite meteorites and returned samples.\n\n
 Lieu : salle 1-2-3\, bât. 121\, IAS
CATEGORIES:Séminaires
LOCATION:IAS\, Bât. 121 rue Jean Teillac\, Orsay\, 91400\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Bât. 121 rue Jean Teillac\
 , Orsay\, 91400\, France;X-APPLE-RADIUS=100;X-TITLE=IAS:geo:0,0
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DTSTART:20251026T020000
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