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Luminosity - oxygen abundance relation for galaxies
Oxygen abundance (expressed in fraction of the solar value) as a function of the luminosity of the galaxies (in logarithm scale). This relation is fundamental in astrophysics. The relation for local galaxies is shown by the solid red line. The blue dots are the values derived from VLT spectra in a subset of the studied galaxies. They reveal for the first time that this relation is changing with time: for a given value of the luminosity, galaxies of different ages present different values of the oxygen abundance.
Crédit:ESO
À propos de l'image
Identification: | eso0502a |
Type: | Graphique |
Date de publication: | 13 janvier 2005 |
Communiqués de presse en rapport: | eso0502 |
Taille: | 800 x 779 px |