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

M. Bergemann; K. Lind; Remo Collet; M. Asplund; Z. Magic

doi:10.1051/epjconf/20121905013

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

M. Bergemann, K. Lind, Remo Collet, M. Asplund, Z. Magic

Astrophysics and Planetary Science

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Abstract

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.

Original language	English
Article number	05013
Journal	E P J Web of Conferences
Volume	19
Number of pages	2
ISSN	2100-014X
DOIs	https://doi.org/10.1051/epjconf/20121905013
Publication status	Published - 2012

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

abstract = "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.",

author = "M. Bergemann and K. Lind and Remo Collet and M. Asplund and Z. Magic",

year = "2012",

doi = "10.1051/epjconf/20121905013",

language = "English",

volume = "19",

journal = "EPJ Web of Conferences",

issn = "2101-6275",

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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 -

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

Abstract

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