The oxygen abundance in the bulge

Ratio of Oxygen over Iron abundance as a function of the iron content in stars (both axis are using logarithmic scales). The green circle denotes the stars in the Bulge studied by the present astronomers, while the yellow triangles and blue crosses are previous data obtained for stars in the disc of our Galaxy. The bulge stars are clearly more oxygen-rich than disc stars, highlighting the 'genetic difference' between the bulge and disc stars.

Crediti:

ESO

Riguardo l'immagine

Identificazione:eso0634b
Tipo:Mappa
Data di rilascio:12 Settembre 2006
Notizie relative:eso0634
Grandezza:2330 x 1106 px

Riguardo all'oggetto

Nome:Milky Way
Tipo:Milky Way : Galaxy
Categoria:Galaxies

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