Spectroscopic parameters of stars (SPECIES). I. Virtual Observatory Resource

Authors
  1. Soto M.G.
  2. Jenkins J.S.
  3. Published by
    CDS
Abstract

The detection and subsequent characterisation of exoplanets are intimately linked to the characteristics of their host star. Therefore, it is necessary to study the star in detail in order to understand the formation history and characteristics of their companion(s). Our aims are to develop a community tool that allows the automated calculation of stellar parameters for a large number of stars, using high resolution echelle spectra and minimal photometric magnitudes, and introduce the first catalogue of these measurements in this work. We measured the equivalent widths of several iron lines and used them to solve the radiative transfer equation assuming local thermodynamic equilibrium in order to obtain the atmospheric parameters (Teff, [Fe/H], logg, and {xi}_t). We then used these values to derive the abundance of 11 chemical elements in the stellar photosphere (Na, Mg, Al, Si, Ca, Ti, Cr, Mn, Ni, Cu, and Zn). Rotation and macroturbulent velocity were obtained using temperature calibrators and synthetic line profiles to match the observed spectra isochrones, we were able to derive the mass, radius, and age for each star using a Bayesian approach. SPECIES obtains bulk parameters that are in good agreement with measured values from different existing catalogues, including when different methods are used to derive them. We find discrepancies in the chemical abundances for some elements with respect to other works, which could be produced by differences in Teff, or in the line list or the atomic line data used to derive them. We also obtained analytic relations to describe the correlations between different parameters, and we implemented new methods to better handle these correlations, which provides a better description of the uncertainties associated with the measurements.

Keywords
  1. optical-observation
  2. catalogs
  3. dwarf-stars
Bibliographic source Bibcode
2018A&A...615A..76S
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/615/A76
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/615/A76
Document Object Identifer DOI
doi:10.26093/cds/vizier.36150076

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/615/A76
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/615/A76
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/615/A76
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/615/A76/tablea3?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/615/A76/tablea3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/615/A76/tablea3?

History

2018-07-17T13:12:22Z
Resource record created
2018-07-17T13:12:22Z
Created
2018-09-25T12:11:51Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr