Abstract
I have compiled the very best data published on abundance gradients. From this sample of 29 galaxies, some information can be gained on the mecanism of morphological evolution in disk galaxies. From this sample, I find that early-type galaxies show an identical trend in the behavior of extrapolated central abundance versus morphological type to that shown by late-type galaxies with strong bars, even in the absence of bar! On a a diagram showing extrapolated central abundance versus morphological type, two sequences appear: late-type barred galaxies and early-type galaxies (barred or not barred) fall on sequence 0.5 dex below that of normal late-type galaxies. This behavior is consistent with a scenario of morphological evolution of disk galaxies by formation and dissolution of a bar over a period of a few 109 yr, where later type galaxies (Sd,Sc,Sbc, evolve into earlier-type disk galaxies trough transitory SBc and SBb phases.
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Dutil, Y. (2001). Chemical Evidence for Evolution of Galaxies. In: Vílchez, J.M., Stasińska, G., Pérez, E. (eds) The Evolution of Galaxies. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-3313-7_35
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DOI: https://doi.org/10.1007/978-94-017-3313-7_35
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