The StaggerGrid Project: a Grid of 3D Model Atmospheres for High-Precision Spectroscopy

TL;DR

The StaggerGrid project develops a comprehensive set of 3D hydrodynamic stellar atmosphere models to improve spectral analysis accuracy for solar- and late-type stars, aiding large observational surveys.

Contribution

It introduces a detailed grid of 3D stellar atmosphere models, highlighting their differences from traditional models and their applications in abundance analysis.

Findings

3D models show significant differences in spectral line predictions.

The models improve elemental abundance accuracy.

Application to large surveys enhances stellar characterization.

Abstract

In this contribution, we present the StaggerGrid, a collaborative project for the construction of a comprehensive grid of time-dependent, three-dimensional (3D), hydrodynamic model atmospheres of solar- and late-type stars with different effective temperatures, surface gravities, and chemical compositions. We illustrate the main characteristics of these 3D models and their effects on the predicted strengths, wavelength-shifts, and shapes of spectral lines, highlighting the differences with respect to calculations based on classical, one-dimensional, hydrostatic models, and discuss some of their possible applications to elemental abundance analysis of stellar spectra in the context of large observational surveys.