Search and Characterization of Exoplanets

Nombre de places: 29 - Langue: Anglais

Objectifs

Since the pioneering discoveries of extrasolar disks and planets in the mid-nineties (Auman et al, 1984; Wolczan et al, 1992, Mayor and Queloz, 1995, the latter Nobel Prizes in Physics 2019), a new domain of astrophysics, exo-planetology, has emerged, that aims at exploring the diversity of extra solar planetary systems (PS), at understanding their formation and early evolution, and at ultimately detecting Earth-like planets. Intimately connected to this domain is the understanding of the origin of life & early evolution, and the search of life on other SS or extrasolar planets. The aim of the course is to present an overview of the methods used to detect and characterise extrasolar planets, and to highlight specific topics currently addressed by the experts community.
• 3-5 keywords defining the scientific aspects of the MC : extrasolar planets, detection, characterisation, formation.
• 3-5 keywords defining the methodological aspects of the MC : lectures, invited talks, hands-on sessions, presentation of papers by the participants.
• Description of the MC, developed in terms of scientific field & methods.
The Master Class aims at providing a global view of the methods of detection and characterisation of extrasolar planets, and the state of the art in the various areas. The approaches will be presented, from the instrumental, observational, data processing points of view, together with the associated challenges (either instrumental or physical), and limitations.
The results obtained with these methods will be described, and the implications on the knowledge of planetary systems formation and evolution will be presented.
Projects for the next decades associated to this very active field of research will be presented.
Many illustrations (examples) will be provided.
The link with our Solar System will be highlighted.
The course will highlight, as much as possible, interdisciplinary questions.
Each half day will typically consist in one lecture + one/two focus(es) given by an invited expert. The lecture will describe the principle of the techniques, the data processing, the results, the limitations and the future of the domain. The focus(es) will broaden the subject.
The lecture and focus(es) will be followed by discussions. Presentation(s) of a paper related to the subject will be given by a participant (a series of papers will be proposed in advance).
Finally, half-day "hands-on" sessions will be proposed on various technics, where the participants will find exoplanets.

Evaluation

Assiduité

Programme

"Day 1: Introduction 22 Nov
AM
Lecture: Context
• Why searching for exoplanets ?
• A little bit of history
• Orders of magnitudes
• Overview of detection methods
• Habitability
Focus: Link with exobiology
Discussion
PM
Lecture: The solar system as a stellar/planetary system
• Formation of the SS and planets : what does this tell us ?
• Solar System planets: what do they tell us ?
Discussion
Day 2: Radial velocities 23 Nov
AM
Lecture: Radial velocities: method and results
• Detection techniques :
• Results:
• Performances, limitations
• Astrophysical results
Focus: The Sun as a star:
Discussion
PM
Hands on : ""Let's find a RV planet""
Presentation(s) of papers
Day 3: Transits
AM
Lecture : Transits: method and results
• Detection technics
• Results:
• Performances, limitations
• Astrophysical results
Focus : Trappist
Discussion
Presentation(s) of papers
PM
Half-day Hands on : ""Let's find a transiting planet""
Day 4: Direct Imaging
AM
Lecture : Direct Imaging: method and results
• Detection technics
• Challenges
• Techniques: AO. Coronagraphy and High Contrast techniques (brief). Spectroscopy
coupled with HCI
• Relevent observables
• HCI data processing
• Orbital characterisation (inc. a little bit of GAIA)
• Results:
• Performances, limitations
• Astrophysical results
Discussion
Presentation(s) of papers
PM
Half-day Hands on : ""Let's find an imaged planet"" / ""Orbital charac""
Day 5: Atmosphere characterisation and planet habitability
AM
Lecture : Atmospheres : models and observations
• Atmospheric models, from SS planets to exoplanets.
• Astrophysical results
• Remote planets
• Close planets
Discussion
PM
Lecture : Habitability
• Definitions
• Models biosignatures; climats
Focus: Complex molecules in astrophysics
Discussion"

Pré-requis

Knowledge of python will be needed for the Hands-on sessions.

Reference : Handbook of exoplanets . 2018. M Perryman. Cambridge.

Equipe enseignante

Responsables : Anne-Marie Lagrange, Johan Mazoyer, Benjamin Charnay

Lecturers (confirmed): François Forget, Alessandro Morbidelli, Stephane
Mazevet, Mickael Bonnefoy, Nadege Meunier, Elsa Ducrot.

Hands-on: Johan Mazoyer, Florian Philippot


 

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