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.

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Rreth fotografisë

Data e Publikimit:12 Shtator 2006
Publikime të ngjashme:eso0634
Përmasat:2330 x 1106 px

Rreth objektit

Emri:Milky Way
Tipi:Milky Way : Galaxy

Formate Fotografish

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