The Stagger-grid: A grid of 3D stellar atmosphere models

Author： Magic Z. Collet R. Asplund M. Trampedach R. Hayek W. Chiavassa A. Stein R. F. Nordlund Å.

E-ISSN： 1432-0746|557|issue|A26-A26

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.557, Iss.issue, 2013-08, pp. : A26-A26

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Abstract

Aims. We present the Stagger-grid, a comprehensive grid of time-dependent, three-dimensional (3D), hydrodynamic model atmospheres for late-type stars with realistic treatment of radiative transfer, covering a wide range in stellar parameters. This grid of 3D models is intended for various applications besides studies of stellar convection and atmospheres per se, including stellar parameter determination, stellar spectroscopy and abundance analysis, asteroseismology, calibration of stellar evolution models, interferometry, and extrasolar planet search. In this introductory paper, we describe the methods we applied for the computation of the grid and discuss the general properties of the 3D models as well as of their temporal and spatial averages (here denoted ⟨3D⟩ models).