Physical parameters of IPHAS-selected classical Be stars

I. Determination procedure and evaluation of the results^⋆

¹ Observatorio Astronómico, Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain
e-mail: leonardo.gkouvelis@uv.es
² Institut d’Astrophysique de Paris, CNRS (UMR 7095), 98 bis bd. Arago, 75014 Paris, France
³ UPMC, Université Paris VI, (UMR 7095), 98 bis bd. Arago, 75014 Paris, France
⁴ Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
⁵ Centre for Astrophysics Research, STRI, University of Hertfordshire, College Lane Campus, Hatfield, AL10 9AB, UK
⁶ Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138, USA

Received: 30 July 2015
Accepted: 11 April 2016

Abstract

We present a semi-automatic procedure to obtain fundamental physical parameters and distances of classical Be (CBe) stars, based on the Barbier-Chalonge-Divan (BCD) spectrophotometric system. Our aim is to apply this procedure to a large sample of CBe stars detected by the IPHAS photometric survey, to determine their fundamental physical parameters and to explore their suitability as galactic structure tracers. In this paper we describe the methodology used and the validation of the procedure by comparing our results with those obtained from different independent astrophysical techniques for subsamples of stars in common with other studies. We also present a test case study of the galactic structure in the direction of the Perseus Galactic Arm, in order to compare our results with others recently obtained with different techniques and the same sample of stars. We did not find any significant clustering of stars at the expected positions of the Perseus and Outer Galactic Arms, in agreement with previous studies in the same area that we used for verification.