gr8stars I: A homogeneous spectroscopic study of bright FGKM dwarfs and a public library of their high-resolution spectra

TL;DR

This paper introduces a comprehensive, homogeneous spectroscopic and photometric database of 5645 bright FGKM dwarf stars, providing high-precision stellar parameters and kinematic classifications to support stellar and exoplanet research.

Contribution

It presents the first all-sky, magnitude-limited sample of bright FGKM dwarfs with uniformly derived spectroscopic and photometric parameters, accessible via an online database.

Findings

Median uncertainties: 106K in temperature, 0.08 dex in gravity, 0.03 dex in metallicity.

Spectroscopic parameters derived using PAWS pipeline with two methods.

Kinematic analysis classifies stars into Galactic components.

Abstract

As the fields of stellar and exoplanetary study grow and revolutionary new detection instruments are created, it is imperative that a homogeneous, precise source of stellar parameters is available. This first work of the gr8stars collaboration presents the all-sky magnitude limited sample of 5645 bright FGKM dwarfs, along with homogeneously derived spectroscopic parameters of a subset of 1716 targets visible from the Northern hemisphere. We have collected high-resolution archival and new spectra from several instruments. Spectrosocpic parameters are determined using the PAWS pipeline, employing both the curve-of-growth equivalent width method, and the spectral synthesis method. We achieve median uncertainties of 106K in stellar effective temperature, 0.08 dex in surface gravity, and 0.03 dex in metallicity. This paper also presents photometric stellar parameters for these dwarfs, determined using SED fitting. The full gr8stars sample selection, including derived spectroscopic and photometric parameters, is made available through an interactive online database. We also perform a kinematic analysis to classify these stars according to their Galactic component.