s- and r-process elements in two very metal-poor stars

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dc.creatorRyan, Sean G.
dc.creatorAoki, Wako
dc.creatorBlake, Lisa A. J.
dc.creatorNorris, John E.
dc.creatorBeers, Timothy C.
dc.creatorGallino, Roberto
dc.creatorBusso, Maurizio
dc.creatorAndo, Hiroyasu
dc.date2000-08-28
dc.date.accessioned2026-07-07T01:55:08Z
dc.date.available2026-07-07T01:55:08Z
dc.descriptionNew measurements of neutron-capture elements are presented for two very metal-poor stars ([Fe/H] ~ -3). One (LP 625-44) has an s-process signature believed to be due to mass transfer from a now-extinct metal-poor AGB companion, and the second (CS 22897-008) is one of a number of very metal-poor stars having high [Sr/Ba] ratios which is not expected from the r-process. In the s-process star, many elements including lead have been detected, providing strong constraints on the 13C pocket in the now-extinct AGB star. In the Sr-rich star, Zn, Y, and Zr are also seen to be overabundant, and several possible nucleosynthesis mechanisms are discussed.
dc.description10 pages, 3 figures. Proc. Torino-Melbourne-Pasadena "Wasserburg" Workshop, U. Torino, 21-22 June 2000. For publication in Mem.S.A.It
dc.identifierhttps://arxiv.org/abs/astro-ph/0008423
dc.identifierhttp://arxiv.org/abs/astro-ph/0008423
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/1552
dc.subjectAstrophysics
dc.titles- and r-process elements in two very metal-poor stars
dc.typetext

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