Masses and luminosities for 342 stars from the PennState-Toru\'n Centre for Astronomy Planet Search

TL;DR

This paper provides revised stellar parameters such as masses, luminosities, ages, and radii for 342 stars, using spectroscopic analysis and Bayesian methods, with some parameters determined for the first time.

Contribution

It introduces updated stellar parameters for a large sample of stars, employing a combination of spectroscopic analysis and Bayesian refinement, including new atmospheric data for 13 stars.

Findings

Revised stellar masses are generally lower than previous estimates.

Spectroscopic parameters for 13 stars are determined for the first time.

The methodology improves accuracy of stellar parameter estimation.

Abstract

We present revised basic stellar astrophysical parameters: masses, luminosities, ages and radii for 342 stars from PennState-Toru\'n Centre for Astronomy Planet Search. Atmospheric parameters for 327 stars are available from Zieli\'nski (2012), for the remaining 15 objects we present also spectroscopic atmospheric parameters: effective temperatures, surface gravities and iron abundances. Spectroscopic atmospheric parameters were obtained with a standard spectroscopic analysis procedure, using ARES (Sousa, 2007) and MOOG (Sneden, 1973) or TGVIT (Takeda, 2005) codes. To refine stellar masses, ages and luminosities we applied a Bayesian method based on Jorgensen (2005) formalism, modified by da Silva (2006). The revised stellar masses for 342 stars and their uncertainties are generally lower than those presented in Zieli\'nski (2012). Atmospheric parameters for 13 objects are determined here for the first time.