Bibcode
Abia, C.; Canal, R.; Isern, J.
Bibliographical reference
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640X), vol. 170, no. 1-2, Aug. 1990, p. 361-365.
Advertised on:
8
1990
Citations
1
Refereed citations
1
Description
The new observational O/Fe vs Fe/H relationship in halo dwarfs is
analyzed in terms of a model of chemical evolution for the solar
neighborhood. The role of nucleosynthesis prescriptions for SN II and SN
I (both Ia and Ib) is analyzed. It is shown that, by adopting iron
yields for SN II according to the observations of SN 1987A and by
assuming double degenerate systems to be the progenitors of SN Ia and
Wolf-Rayet stars to be the progenitors of SN Ib, it is possible to
reproduce quite well the behavior of the O/Fe ratio for halo and disk
stars. Nevertheless, best agreement is obtained when introducing in
addition a variable IMF during the halo evolution.