# Calibrating damping rates with LEGACY linewidths

## TL;DR

This paper presents a method to calibrate stellar damping rates by combining nonadiabatic stability analysis with 3D simulation data, improving the modeling of stellar oscillations.

## Contribution

It introduces a calibration approach for damping rates using LEGACY linewidths and 3D simulation insights within a nonlocal convection model.

## Key findings

- Calibrated mixing-length parameter to match convection zone depth.
- Adjusted nonlocal convection parameters based on linewidth measurements.
- Integrated 3D simulation data to refine atmospheric and turbulence modeling.

## Abstract

Linear damping rates of radial oscillation modes in selected $Kepler$ stars are estimated with the help of a nonadiabatic stability analysis. The convective fluxes are obtained from a nonlocal, time-dependent convection model. The mixing-length parameter is calibrated to the surface-convection-zone depth of a stellar model obtained from fitting adiabatic frequencies to the LEGACY observations, and two of the three nonlocal convection parameters are calibrated to the corresponding LEGACY linewidth measurements. The atmospheric structure in the 1D stability analysis adopts a temperature-optical-depth relation derived from 3D hydrodynamical simulations. Results from 3D simulations are also used to calibrate the turbulent pressure and to guide the functional form of the depth-dependence of the anisotropy of the turbulent velocity field in the 1D stability computations.