Computation of 3D simulations of cool stars with CO5BOLD (Freytag et al. 2012, Journal of Computational Physics, 231) for star-in-a-box model (global model) and with Stagger-code (Nordlund, Stein et Asplund, Living Reviews in Solar Physics 2009, vol. 6, no. 2) for box-in-a-star (local model).
New generation of Red Supergiant simualtions to unveil the mass-loss mechanism
High numerical resolution / non-grey / grid of new stellar paramters
Click on the image to see a movie of the bolometric emerging intensity of the highest resolution simulation. Chiavassa, Freytag, Masseron & Plez 2011, A&A (ADS link)
Voyage over the surface of a supergiant. Click on the images to start the videos !!!!!!
3D Radiative Transfer code OPTIM3D (Chiavassa et al. 2009, A&A, ADS link) using three dimensional simulations in the star-in-a-box configuration (CO5BOLD) as input:
1) spectral synthesis --> to constrain the atmospheric dynamics, photometry, stellar parameters, abundances
2) intensity maps --> to constrain the granulation structure size, the limb darkening, the characterization of the hosted planets
Data redution with VLTI-AMBER
Measurement and characterization of the convective pattern (granule size, surface contrast, timescales) of red supergiant stars, K giants, sub-giants and solar type stars.
3D Radiative Transfer code OPTIM3D (Chiavassa et al. 2009, A&A, ADS link) using three dimensional simulations in the box-in-a-star configuration (Stagger-code, Nordlund, Stein et Asplund, Living Reviews in Solar Physics 2009, vol. 6, no. 2) as input: