Spectral diagnostics of late-type stars: non-LTE and <3D> approach

TY - GEN

T1 - Spectral diagnostics of late-type stars

T2 - non-LTE and <3D> approach

AU - Bergemann, M.

AU - Lind, K.

AU - Collet, Remo

AU - Asplund, M.

AU - Magic, Z.

PY - 2012

Y1 - 2012

N2 - We determine effective temperature, metallicity, and microturbulence for a number of well-studied late-type stars. We use the new NLTE atomic model of Fe, and discuss the results for the MARCS models, as well as for the spatial and temporal averages of full 3D hydrodynamical simulations of stellar convection. It is shown that, contrary to the mean 3D models, certain limitations shall be imposed on the line formation and spectrum synthesis calculations with classical hydrostatic 1D models to obtain physically-realistic results.

AB - We determine effective temperature, metallicity, and microturbulence for a number of well-studied late-type stars. We use the new NLTE atomic model of Fe, and discuss the results for the MARCS models, as well as for the spatial and temporal averages of full 3D hydrodynamical simulations of stellar convection. It is shown that, contrary to the mean 3D models, certain limitations shall be imposed on the line formation and spectrum synthesis calculations with classical hydrostatic 1D models to obtain physically-realistic results.

U2 - 10.1051/epjconf/20121905013

DO - 10.1051/epjconf/20121905013

M3 - Conference article

SN - 2101-6275

VL - 19

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 05013

ER -