Astron. Astrophys. Suppl. Ser.
Volume 134, Number 3, February I 1999
|Page(s)||473 - 482|
|Published online||15 February 1999|
Spectral classifications in the near infrared of stars with composite spectra*
III. Study of a sample of 137 objects with the Aurelie spectrograph
Observatoire Midi-Pyrénées, UMR 5572 (CNRS), 14 avenue Edouard Belin, 31400 Toulouse, France
2 Observatoire de Strasbourg, URA 1280 (CNRS), 11 rue de l'Université, 67000 Strasbourg, France
Send offprint request to: J.M. Carquillat
Accepted: 3 July 1998
We provide spectral classifications for a sample of 137 stars mentioned as having composite spectra. The classifications were carried out on 33 Å/mm spectra in the region Å. Of these 137 objects, 115 correspond in the infrared to cool stars (G, K or M) of luminosity classes III, II and I; for 22 stars, we find only hot spectra of types B, A, F or Am, so that they do not fulfil our definition of composite spectra. We detect four new Am stars, and one Am star (HD 70826) turns out to be a composite spectrum object. As in Paper II, the cool components of composite spectra show a strong concentration in the vicinity of G8III.
Key words: stars: fundamental parameters / stars: infrared / binaries: spectroscopic
© European Southern Observatory (ESO), 1999