Inhomogeneous chemical evolution of the Galactic disk: evidence for sequential stellar enrichment?

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dc.creatorHoek, Bob van den
dc.creatorde Jong, Teije
dc.date1996-07-02
dc.date1996-07-08
dc.date.accessioned2026-07-07T08:58:24Z
dc.date.available2026-07-07T08:58:24Z
dc.descriptionWe investigate the origin of the abundance variations observed among similarly aged F and G dwarfs in the local Galactic disk. We present arguments in support of combined infall of metal-deficient gas and sequential enrichment by successive stellar generations in the local Galactic disk ISM. We show that galactic chemical evolution models which take into account these processes simultaneously are consistent with both the observed abundance variations among similarly aged dwarfs in the solar neighbourhood and the abundances observed in the local disk ISM. For reasonable choices of parameters, these models can reproduce variations in [M/H] for individual elements M = C, O, Fe, Mg, Al, and Si as well as the scatter observed in abundance-abundance relations like [O/Fe]. For the same models, the contribution of sequential stellar enrichment to the magnitude of the observed abundance variations can be as large as 50%. We discuss the impact of sequential stellar enrichment and episodic infall of metal-deficient gas on the inhomogeneous chemical evolution of the Galactic disk.
dc.description25 pages, 14 Postscript figures, uses psfig.sty and l-aa.sty, accepted by Astronomy and Astrophysics (Main Journal), June 1996, improved page format, minor changes in refs
dc.identifierhttps://arxiv.org/abs/astro-ph/9607006
dc.identifierhttp://arxiv.org/abs/astro-ph/9607006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/147312
dc.subjectAstrophysics
dc.titleInhomogeneous chemical evolution of the Galactic disk: evidence for sequential stellar enrichment?
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