Project description DEENESFRITPL Beyond Neptune: blocked star light reveals shapes, atmosphere, and rings Neptune, the outermost planet in our solar system, took shape 4.5 billion years ago, likely forming closer to the Sun and moving to the outer solar system about 4 billion years ago. Neptune and the trans-Neptunian objects (TNOs) (minor planets including Pluto orbiting the Sun beyond Neptune) carry essential information about the formation and evolution of our solar system. The ERC-funded LUCKY STAR project will harness its world-leading methods and instrumentation for analysing stellar occultations (obstructions of a star’s light by an object between the star and observer) to study TNOs to gain insight into rings around small bodies, Pluto’s atmosphere, and TNOs from sub-km to thousand-km size. Show the project objective Hide the project objective Objective The solar system beyond Neptune’s contains largely unaltered material from the primordial circum-solar disk. It also kept the memory of the early planetary migrations, and thus contains essential information on the origin and evolution of our planetary system.Here I propose to study the Trans-Neptunian Objects (TNOs) using the stellar occultation technique. It consists in observing the passage of remote TNOs in front of those “Lucky Stars”, that reveal shapes, atmosphere and rings of bodies from sub-km to thousand-km in size. Very few teams in the world master this method. The European-led network that I coordinate is now leader in predictions, instrumentation, observations and analysis related to stellar occultations, with innovative approaches and unprecedented results.In the last decade, our group led the field by discovering rings around the asteroid-like object Chariklo, detecting sub-km TNOs and drastic variations of Pluto’s atmospheric pressure. Based on those noteworthy discoveries and unique skills of ours, I will coordinate the following work packages:(1) Rings around small bodies - Understand the newly found Chariklo’s rings, tackle the theory of rings’ origins and evolutions around small bodies, discover new ring systems around other bodies. (2) Very small, sub-km TNOs and Oort Cloud objects - Constrain the collisional history of our early outer solar system, and possibly detect Oort Cloud objects.(3) Pluto’s atmosphere – Explore Pluto’s atmosphere and its atypical seasonal cycle, search for atmospheres around other TNOs.(4) Explore specific, large TNOs – Provide their sizes, shapes, albedos and densities.These programs are timely in view of NASA/New Horizons Pluto flyby in July 2015, and the ESA/GAIA mission expected to provide a greatly improved astrometric catalog release in 2016.Most of the budget will be dedicated to human power to conduct observations and their analysis, plus the associated travel and telescope time expenses. Fields of science natural sciencesphysical sciencesastronomyplanetary sciences Keywords Pluto rings Trans-Neptunian Objects Oort Cloud Programme(s) H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) Main Programme Topic(s) ERC-ADG-2014 - ERC Advanced Grant Call for proposal ERC-2014-ADG See other projects for this call Funding Scheme ERC-ADG - Advanced Grant Host institution SORBONNE UNIVERSITE Net EU contribution € 650 000,00 Address 21 RUE DE L'ECOLE DE MEDECINE 75006 Paris France See on map Region Ile-de-France Ile-de-France Paris Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 650 000,00 Beneficiaries (2) Sort alphabetically Sort by Net EU contribution Expand all Collapse all SORBONNE UNIVERSITE France Net EU contribution € 650 000,00 Address 21 RUE DE L'ECOLE DE MEDECINE 75006 Paris See on map Region Ile-de-France Ile-de-France Paris Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 650 000,00 OBSERVATOIRE DE PARIS France Net EU contribution € 1 773 750,00 Address AVENUE DE L OBSERVATOIRE 61 75014 Paris See on map Region Ile-de-France Ile-de-France Paris Activity type Higher or Secondary Education Establishments Links Contact the organisation Opens in new window Website Opens in new window Participation in EU R&I programmes Opens in new window HORIZON collaboration network Opens in new window Total cost € 1 773 750,00
