Open clusters appear as simple objects in many respects, with a high degree of homogeneity in their (initial) chemical composition, and the typical solar-scaled abundance pattern that they exhibit for the majority of the chemical species. The striking singularity is represented by heavy elements produced from the slow process of the neutron-capture reactions. In particular, young open clusters (ages less than a few hundred Myr) give rise to the so-called barium puzzle: that is an extreme enhancement in their [Be/Fe] ratios, up to a factor of four of the solar value, which is not followed by other nearby s-process elements (e.g., lanthanum and cerium). The definite explanation for such a peculiar trend is still wanting, as many different solutions have been envisaged. We review the status of this field and present our new results on young open clusters and the pre-main sequence star RZ Piscium.

D’Orazi, V., Baratella, M., Lugaro, M., Magrini, L., Pignatari, M. (2022). The Complex Behaviour of s-Process Element Abundances at Young Ages. UNIVERSE, 8(2) [10.3390/universe8020110].

The Complex Behaviour of s-Process Element Abundances at Young Ages

Valentina D’Orazi
;
2022-01-01

Abstract

Open clusters appear as simple objects in many respects, with a high degree of homogeneity in their (initial) chemical composition, and the typical solar-scaled abundance pattern that they exhibit for the majority of the chemical species. The striking singularity is represented by heavy elements produced from the slow process of the neutron-capture reactions. In particular, young open clusters (ages less than a few hundred Myr) give rise to the so-called barium puzzle: that is an extreme enhancement in their [Be/Fe] ratios, up to a factor of four of the solar value, which is not followed by other nearby s-process elements (e.g., lanthanum and cerium). The definite explanation for such a peculiar trend is still wanting, as many different solutions have been envisaged. We review the status of this field and present our new results on young open clusters and the pre-main sequence star RZ Piscium.
2022
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/05
English
Con Impact Factor ISI
D’Orazi, V., Baratella, M., Lugaro, M., Magrini, L., Pignatari, M. (2022). The Complex Behaviour of s-Process Element Abundances at Young Ages. UNIVERSE, 8(2) [10.3390/universe8020110].
D’Orazi, V; Baratella, M; Lugaro, M; Magrini, L; Pignatari, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/354306
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