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.

Crediti:

ESO

Riguardo l'immagine

Identificazione:eso0502a
Tipo:Mappa
Data di rilascio:13 Gennaio 2005
Notizie relative:eso0502
Grandezza:800 x 779 px

Riguardo all'oggetto

Nome:Galaxies
Tipo:Local Universe : Galaxy
Categoria:Galaxies

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