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SUMMARY:A chemical survey of planets in our galaxy - Giovanna Tinetti (UCL
 )
DTSTART:20181018T150000Z
DTEND:20181018T160000Z
UID:TALK111703@talks.cam.ac.uk
CONTACT:28811
DESCRIPTION:Thousands of exoplanets have now been discovered with a broad 
 range of\nmasses\, sizes and orbits: from rocky Earth-size planets to lar
 ge gas giants\ngrazing the surface of their host star. However\, the esse
 ntial nature of\nthese exoplanets remains largely mysterious: there is no
  known\, discernible\npattern linking the presence\, size\, or orbital pa
 rameters of a planet to\nthe nature of its parent star. We have little id
 ea whether the chemistry of a\nplanet is linked to its formation environm
 ent\, or whether the type of host\nstar drives the physics and chemistry 
 of the planet’s birth\, and\nevolution. Work in exoplanet spectroscop
 y with current instruments has thus\nfar been very piecemeal and mainly fo
 cused on gaseous planets. \n\nThe launch of the James Webb Space Telescop
 e next year will permit for the\nfirst time the remote exploration of smal
 ler planets: super-Earths and\nsub-Neptunes. However\, progress with the s
 cience questions spelled out above\ndemands a very large\, unbiased spectr
 oscopic survey of exoplanets. In the\nnext decade new dedicated space miss
 ions\, such as the ESA's next medium-class\nscience mission ARIEL\,  ha
 ve been conceived to conduct such a survey and to\nexplore the nature of 
 exoplanet atmospheres and\, through this\, the key\nfactors affecting the 
 formation and evolution of planetary systems in our\ngalaxy.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 3:30 pm)
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