Inhomogeneous Galactic halo: a possible explanation for the spread observed in s- and r- process elements

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dc.creatorCescutti, G.
dc.date2007-02-21
dc.date.accessioned2026-07-07T07:47:54Z
dc.date.available2026-07-07T07:47:54Z
dc.descriptionThe considerable scatter of the s- and r-process elements observed in low-metallicity stars, compared to the small star to star scatter observed for the alpha elements, is an open question for the chemical evolution studies. We have developed a stochastic chemical evolution model, in which the main assumption is a random formation of new stars, subject to the condition that the cumulative mass distribution follows a given initial mass function. With our model we are able to reproduce the different features of alpha-elements and s-and r-process elements. The reason for this resides in the random birth of stellar masses coupled with the different stellar mass ranges from where alpha-elements and s-and r-process elements originate. In particular, the sites of production of the alpha elements are the whole range of the massive stars, whereas the mass range of production for the s- and r-process elements has an upper limit of 30 solar masses.
dc.description2 pages, 2 figures, proceedings of "From stars to galaxies", Venice October 2006, to be published in the Astronomical Society of the Pacific Conference Series
dc.identifierhttps://arxiv.org/abs/astro-ph/0702573
dc.identifierhttp://arxiv.org/abs/astro-ph/0702573
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124319
dc.subjectAstrophysics
dc.titleInhomogeneous Galactic halo: a possible explanation for the spread observed in s- and r- process elements
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