Chemical evolution with rotating massive star yields - I. The solar neighbourhood and the s-process elements

By N. Prantzos, C. Abia, M. Limongi, A. Chieffi, S. Cristallo. 2018

196 citations recorded by the source corpus.

We present a comprehensive study of the abundance evolution of the elements from H to U in the Milky Way halo and local disk. We use a consistent chemical evolution model, metallicity dependent isotopic yields from low and intermediate mass stars and yields from massive stars which include, for the first time, the combined effect of metallicity, mass loss and rotation for a large grid of stellar masses and for all stages of stellar evolution. The yields of massive stars are weighted by a metallicity dependent function of the rotational velocities, constrained by observations as to obtain a primary-like $^{14}$N behavior at low metallicity and to avoid overproduction of s-elements at intermediate metallicities. We show that the solar system isotopic composition can be reproduced to better than a factor of two for isotopes up to the Fe-peak, and at the 10\% level for most pure s-isotopes, both light ones (resulting from the weak s-process in rotating massive stars) and the heavy ones (resulting from the main s-process in low and intermediate mass stars). We conclude that the light element primary process (LEPP), invoked to explain the apparent abundance deficiency of the s-elements with A< 100, is not necessary. We also reproduce the evolution of the heavy to light s-elements abundance ratio ([hs/ls]) - recently observed in unevolved thin disk stars - as a result of the contribution of rotating massive stars at sub-solar metallicities. We find that those stars produce primary F and dominate its solar abundance and we confirm their role in the observed primary behavior of N. In contrast, we show that their action is insufficient to explain the small observed values of C12/C13 in halo red giants, which is rather due to internal processes in those stars.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/c8ceafac955587461230e7b4700a46073dbb10e5

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In Astronomy and Astrophysics

1. M. Limongi
2. A. Chieffi
3. R. Hirschi
4. Stan Woosley
5. R. Dav'e
6. Ken'ichi Nomoto
7. Nozomu Tominaga
8. G. Meynet

In Instrumentation

1. A. Chieffi
2. M. Limongi

Citations in the corpus

• Presupernova Evolution and Explosive Nucleosynthesis of Rotating Massive Stars in the Metallicity Range −3 ≤ [Fe/H] ≤ 0 (2018, background): “…observational data) but show a spread of values, the choice of an IDROV (Initial Distribution of ROtation Velocities) is mandatory (as the IMF for the mass distribution) when trying to fit the properties of a given sample of stars or a trend with the metallicity (Prantzos et al. 2018, CL13).”