Beryllium spectral lines in three stars
Reproduction of a small wavelength region of the spectra obtained with the UVES spectrometer at the 8.2-m Kueyen telescope at Paranal of these stars (above), together with that of another nearby star, HD 218502, a field star in which the Beryllium lines are also visible (below). This star, however, is not a member of a cluster and its age is not well known. The achieved signal-to-noise ratios are indicated. The best-fitting synthetic spectra are show as red dots; in the spectrum of A2111, the blue dashed lines illustrate the accuracy of the fit - they correspond to a variation of the Beryllium content by approx. ± 50% (0.2 dex).
Crédit:ESO
À propos de l'image
Identification: | eso0425c |
Type: | Graphique |
Date de publication: | 17 août 2004 |
Communiqués de presse en rapport: | eso0425 |
Taille: | 800 x 792 px |
À propos de l'objet
Couleurs & filtres
Domaine | Longueur d'onde | Télescope |
---|---|---|
Ultraviolet U | 313 nm | Very Large Telescope UVES |