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Titre du document / Document title

Spectroscopic survey of post-AGB star candidates

Auteur(s) / Author(s)

PEREIRA C. B. (1) ; MIRANDA L. F. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Observatório Nacional-MCT, Rua José Cristino 77, CEP 20921-400 Sâo Cristóvão, Rio de Janeiro-RJ, BRESIL
(2) Instituto de Astrofísica de Andalucía, CSIC, Apdo. 3004, 18080 Granada, ESPAGNE

Résumé / Abstract

Aims. Our goal is to establish the true nature of post-AGB star candidates and to identify new post-AGB stars. Methods. We used low resolution optical spectroscopy and we compared the spectra of the candidate post-AGB stars with those of stars in the library specta available in the literature and with spectra of "standard" post-AGB stars, and direct imaging in narrow-band filters. Results. Spectra were obtained for 16 objects: 14 objects have not been observed previously and 2 objects are already known post-AGB stars used as "standards" for identification. From the spectra we identify: six new post-AGB stars with spectral types between G5 and F5, two H II regions the morphology of which is revealed in the direct images for the first time, a G giant with infrared emission, a young stellar object, a probable post-AGB star with emission lines and three objects for which the classification is still unclear. As a whole, our results provide new, reliable identifications for 10 objects among listed post-AGB star candidates.

Revue / Journal Title

Astronomy and astrophysics    ISSN  0004-6361   CODEN AAEJAF 

Source / Source

2007, vol. 462, no1, pp. 231-236 [6 page(s) (article)] (41 ref.)

Langue / Language

Anglais

Editeur / Publisher

EDP Sciences, Les Ulis, FRANCE  (1969) (Revue)

Mots-clés anglais / English Keywords

Pre-main-sequence stars

;

Classification

;

Emission line stars

;

Young stellar object

;

Morphology

;

HII regions

;

Spectral type

;

Optical spectrometry

;

Asymptotic giant branch

;

Mots-clés français / French Keywords

Etoile pré séquence principale

;

Classification

;

Etoile raie émission

;

Objet stellaire jeune

;

Morphologie

;

Région HII

;

Type spectral

;

Spectrométrie optique

;

Branche géante asymptotique

;

Mots-clés espagnols / Spanish Keywords

Objeto estelar joven

;

Tipo espectral

;

Espectrometría óptica

;

Rama gigante asintótica

;

Mots-clés d'auteur / Author Keywords

stars: AGB and post-AGB

;

H II regions

;

stars: pre-main sequence

;

Localisation / Location

INIST-CNRS, Cote INIST : 14176, 35400015960280.0270

Nº notice refdoc (ud4) : 18424039



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