The SpaceInn-SISMA database: characterization of a large sample of variable and active stars by means of HARPS spectra

TL;DR

This paper presents the creation of a comprehensive spectroscopic database of over 7000 HARPS spectra for 261 stars, combining spectroscopic and photometric data to characterize variable and active stars, aiding asteroseismic studies.

Contribution

The paper introduces a large, VO-compliant database of spectroscopic parameters and variability indicators for a significant sample of variable stars observed with HARPS, enhancing stellar characterization tools.

Findings

Characterized 261 stars with spectroscopic parameters.

Extracted variability indicators such as line profiles and activity indices.

Provided combined spectroscopic and photometric data for selected stars.

Abstract

We created a large database of physical parameters and variability indicators by fully reducing and analysing the large number of spectra taken to complement the asteroseismic observations of the CoRoT satellite. 7103 spectra of 261 stars obtained with the ESO echelle spectrograph HARPS have been stored in the VO-compliant database Spectroscopic Indicators in a SeisMic Archive (SISMA), along with the CoRoT photometric data of the 72 CoRoT asteroseismic targets. The remaining stars belong to the same variable classes of the CoRoT targets and were observed to better characterize the properties of such classes. Several useful variability indicators (mean line profiles; indices of differential rotation, activity and emission lines) together with vsini and radial velocity measurements have been extracted from the spectra. The atmospheric parameters Teff, logg and [Fe/H] have been computed following a homogeneous procedure. As a result, we fully characterize a sample of new and known variable stars by computing several spectroscopic indicators, also providing some cases of simultaneous photometry and spectroscopy.