Seminars

Linking stellar compositions and planet formation: implications for solar models and stellar surface abundances
Masanobu Kunitomo (Kurume University)

Salle de réunion AGO (local -1/14), Institut d'Astrophysique et de Géophysique
Bâtiment B5c, Quartier Agora, Allée du 6 Août, 19C, B-4000 Liège 1 (Sart-Tilman)

Stars grow by accretion from the protoplanetary disk where planets are formed. Planet formation theory predicts that the composition of the disk gas, and thus of the gas accreted by protostars, must have been variable: the growth and inward drift of dust in the disk leads to the generation of a temporal "pebble wave" of increased metallicity, followed by a phase in which the exhaustion of the pebbles and the formation of planets leads to the accretion of metal-poor gas. How does accretion affect stellar composition? First I will show our solar models with the accretion in the early Solar System which can have a larger central metallicity by up to 5% and thus higher neutrino fluxes, demonstrating that the formation history of the Solar System constitutes a key element in resolving the "solar modeling problem". I will also discuss the implications for chemical peculiarities in other stars: the surface compositions of refractory-poor solar twins, binary systems, and lambda Boo stars.

TBA
Zhao Guo (KULeuven)

Salle de réunion AGO (local -1/14), Institut d'Astrophysique et de Géophysique
Bâtiment B5c, Quartier Agora, Allée du 6 Août, 19C, B-4000 Liège 1 (Sart-Tilman)

TBA
Matteo Pracchia (Université de Liège)

Salle de réunion AGO (local -1/14), Institut d'Astrophysique et de Géophysique
Bâtiment B5c, Quartier Agora, Allée du 6 Août, 19C, B-4000 Liège 1 (Sart-Tilman)

TBA
Dixeena Lopez (Université de Liège)

Le lieu où se tiendra cet évènement n'est pas encore déterminé...

TBA
Victoria Bonidie (Pittsburgh University)

Salle de réunion AGO (local -1/14), Institut d'Astrophysique et de Géophysique
Bâtiment B5c, Quartier Agora, Allée du 6 Août, 19C, B-4000 Liège 1 (Sart-Tilman)