Research Note

Principal component analysis-based inversion of effective temperatures for late-type stars^⋆

¹ Université de Toulouse, UPS-Observatoire Midi-Pyrénées, Irap, 31028 Toulouse Cedex 4 France
e-mail: fpaletou@irap.omp.eu
² CNRS, Institut de Recherche en Astrophysique et Planétologie, 14 Av. E. Belin, 31400 Toulouse, France
³ Department of Physics and Astronomy, Notre Dame University-Louaize, PO Box 72, Zouk Mikaël, Lebanon
⁴ Armagh Observatory, College Hill, BT61 9DG Armagh, Northern Ireland

Received: 24 June 2015
Accepted: 14 July 2015

Abstract

We show how the range of application of the principal component analysis-based inversion method of Paletou et al. (2015, A&A, 573, A67) can be extended to data for late-type stars. Besides being an extension of its original application domain, which applied to FGK stars, we also used synthetic spectra for our learning database. We discuss our results for effective temperatures in comparison with previous evaluations made available from VizieR and Simbad services at CDS.