I. A spectroscopic search for candidates in the area photometrically surveyed
Dpto. de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Apdo. de Correos 99, 03080, Alicante, Spain
2 Observatoire de Strasbourg, 11 rue de l'Université, 67000 Strasbourg, France
Corresponding author: A. Marco, email@example.com
Accepted: 28 June 2002
We present low-resolution spectroscopy of the majority of the stars in the field of NGC 1893 which were classified as non-members based on the photometry of Marco et al. (2001). We separate field stars from pre-main-sequence members based on a combination of spectral type and photometric indices which allows us to determine the reddening to the objects. For candidates to pre-main-sequence objects, we present intermediate-resolution spectra. We confirm 3 F-type emission-line objects as massive T Tauri stars in NGC 1893 and find two good candidates for being absorption-line Herbig A stars. A B5 star is a very good candidate for an absorption-line Herbig B star. We also investigate the nature of emission-line B-type stars close to the cluster centre. Available evidence suggests that both classical Be stars and Herbig Be stars are present in NGC 1893.
Key words: open clusters and associations: individual: NGC 1893 / stars: pre-main sequence / stars: emission line, Be / stars: early-type
© ESO, 2002