Calibration of the convective parameters in stellar pulsation hydrocodes

ABSTRACT Despite the appearance of two- and three-dimensional models thanks to rapid growth computing performance, numerical hydrocodes used model radial stellar pulsations (RSPs) still apply a one-dimensional envelope without any realistic atmosphere, in which significant improvement was inclusion turbulent convection. However, convection is an inherently multidimensional physical process vicinity ionization zones that generate pulsation. The description these processes one dimension can only be approximated based on simplified theoretical considerations involving several undetermined dimensionless parameters. In this work, we confront two codes, namely Budapest–Florida code MESA RSPs module, with radial-velocity observations non-modulated RRab stars M3 globular cluster specified convective parameters by measured data for both codes independently. Our determination shows some depend effective temperature, dependence established first time also found degeneracy between This procedure gives as by-product suggestions publicly available RSP extensively recently researchers through package. work part preparatory establish framework required make progress results couple them ones further detailed analysis processes.