Using CO5BOLD models to predict the effects of granulation on colours

P. Bonifacio (1) , E. Caffau (1) , H.-G. Ludwig (2, 1) , M. Steffen (3, 1) , F. Castelli , A. J. Gallagher (1) , D. Prakapavičius , A. Kučinskas (4) , R. Cayrel (1) , B. Freytag , B. Plez (5) , D. Homeier (6)

1 GEPI - Galaxies, Etoiles, Physique, Instrumentation
2 ZAH - Zentrum für Astronomie der Universität Heidelberg
3 AIP - Leibniz-Institut für Astrophysik Potsdam
4 LAOB - Laboratoire d'astrophysique de l'observatoire de Besançon (UMR 6091)
5 LUPM - Laboratoire Univers et Particules de Montpellier
6 CRAL - Centre de Recherche Astrophysique de Lyon

In order to investigate the effects of granulation on fluxes and colours, we computed the emerging fluxes from the models in the CO5BOLD grid with metallicities [M/H]=0.0,-1.0,-2.0 and -3.0. These fluxes have been used to compute colours in different photometric systems. We explain here how our computations have been performed and provide some results.

Mots clés: Convection; Hydrodynamics; Stars: atmospheres

Domaines: Physique [physics]; Astrophysique [astro-ph]

P. Bonifacio, E. Caffau, H.-G. Ludwig, M. Steffen, F. Castelli, et al.. Using CO5BOLD models to predict the effects of granulation on colours. Memorie della Societa astronomica italiana, 2017, 88, pp.90-99. ⟨hal-02268806⟩