Testing evolutionary tracks of Pre-Main Sequence stars: the case of HD113449

TL;DR

This study aims to empirically test and refine evolutionary tracks of Pre-Main Sequence stars by measuring the masses of HD113449's components through combined spectroscopic and interferometric observations.

Contribution

It introduces a method to estimate stellar masses of a Pre-Main Sequence binary using combined radial velocity and infrared interferometry data, providing initial mass estimates.

Findings

First mass estimates of HD113449 components derived

Combined observational approach demonstrates potential for testing stellar evolution models

Additional measurements will improve mass precision

Abstract

Evolutionary tracks are of key importance for the understanding of star formation. Unfortunately, tracks published by various groups differ so that it is fundamental to have observational tests. In order to do this, we intend to measure the masses of the two components of the Pre-Main Sequence binary HD113449 by combining radial velocity measurements taken with HARPS, with infrared interferometric data using AMBER on the VLTI. The spectroscopic orbit that has already been determined, combined with the first AMBER measurement, allows us to obtain a very first estimation of the inclination of the binary system and from this the masses of the two stars. More AMBER measurements of HD 113449 are needed to improve the precision on the masses: in the ESO period P82 two new measurements are scheduled.