1. P4 : Stellar system formation and life appearance conditions
Expression of interest
Call of interest
Hyper-Emblematic project P2IO

2. Stellar and Planetary Formation
Explaining the formation of stars and planetary systems is one of the fundamental challenges of modern astrophysics.
The processes involved are numerous, coupled and multi-scale.
A better description would allow a better understanding of many aspects in modern astrophysics.
Key question to be answered:
How do stars form?
Do we understand stellar structure and evolution?
What is the life-cycle of the interstellar medium and stars?
How do planetary systems form and evolve?
What is the diversity of planetary systems across the Galaxy?
Is there any evidence for life on exoplanets?
Keywords:
Structure and dynamics, Radiation, Magnetic fields,…
From interstellar medium to stellar and planetary formation sites.
Potential teams involved at P2IO:
DAp/AIM, IAS, CSNSM, IPNO,…
AMI P4 - P2IO – 15 nov. 2017

3. Stellar and Planetary Formation
Each P2IO team is involved in some of these topics
Following different approaches:
Instrumentation, multi-wavelength observations (including granted time in many facilities), laboratory experiments simulating the micro-physics of astrophysical environments, numerical simulations, modelling, theory, …
Being at the state of the art of each topic
Objectives of the project:
To create an exceptional pole combining all the skills at P2IO
AIM, IAS, CSNSM, IPNO, …
To coordinate the different approaches within all the teams
Focus on selected questions
Improve the synergies
Increase the international visibility of P2IO
E.g. observations of one team used to constrain numerical simulations of another one
AMI P4 - P2IO – 15 nov. 2017

4. … Stellar and Planetary Formation Artemis/APEX NIKA2/IRAM Alma JWST
Hayabusa-2
JWST
XMM
VISIR/VLT
Euclid
Juice
SPICA
(Alma, Artemis/APEX, NIKA2/IRAM, XMM, VISIR/VLT, JWST, Hayabusa-2, etc.) et futurs (JUICE, Euclid, ELT, SPICA, etc).
ELT
Ariel …
AMI P4 - P2IO – 15 nov. 2017

5. Numerical simulations
Stellar and Planetary Formation
Complementary approaches inside P2IO
Observations
Multi wavelength: from X to submillimeter
What observables are needed to trace the physical conditions and evolution of interstellar matter in galaxies?    
What steps lead to global formation?  
How is the gas dissipated?  
How are the grains incorporated in the discs?
The formation of the solar system and its evolution is exceptional or general?
Numerical simulations
Dynamics of a magnetized material (gas & grains)
Role of the radiative transfer from diffuse interstellar medium to stellar and planetary formation sites?
Instabilities, turbulence, transport of angular momentum and magnetic flux
Protoplanetary disks: dynamics of charged grains and growth towards planetesimals
Laboratory experiments
Dominant processes of grain production, growth and fragmentation?  
Role of irradiation (by photons or cosmic rays) on grain properties and their coupling to gas?  
To extract the solar system archives contained in the extra-terrestrial samples collected and analysed
What is the chemical composition of the nebula and how are the elements distributed?
AMI P4 - P2IO – 15 nov. 2017

6. Stellar and Planetary Formation
These synergies are not artificial. Teams are complementary
P4 teams are already working together
But at a small scale
Example of on-going collaborations at P2IO:
a 6 weeks international workshop (AIM, IAS & CSNSM)
Formation, collapse and fragmentation of dense cores
Evolution of protoplanetary discs including:
the origin of the angular momentum transport
the dynamics of gas and dust
the growth from grains to planetesimals
Solar nebulae constituents:
Study grains and meteorites
from a dynamical and chemical perspectives
Formation, collapse and fragmentation of dense cores
Evolution of protoplanetary discs
The solar nebulae constituents
Website :
AMI P4 - P2IO – 15 nov. 2017

7. Stellar and Planetary Formation
Hyper-Emblematic project at P2IO on this P4 discipline is:
Improve and further develop the synergies between the teams
Necessary to extract the best science at P2IO
Focus on given selected objectives
Increase the international visibility
Increase the return of investment
Timely:
Many new facilities being developed or starting operations
State of the art knowledge in each team that provide input or interpretations to the science done in another group
The key questions that could be treated can impact many other disciplines in modern astrophysics
Soutenir structuration et les equipes pour pouvoir aller chercher des projets plus grands
Formation, collapse and fragmentation of dense cores
Evolution of protoplanetary discs
The solar nebulae constituents
AMI P4 - P2IO – 15 nov. 2017