A window on the efficiency of the s-process in AGB stars: chemical abundances of n-capture elements in the planetary nebula NGC 3918

2); (2) ULL; (3) U. West Georgia; (4) IA-UNAM; C. Morisset (4) ((1) IAC; J. Garc\'ia-Rojas (1; Mexico); N. C. Sterling (3); S. Madonna (1; Spain

arxiv: 1510.04548 · v1 · pith:E4VIEACMnew · submitted 2015-10-15 · 🌌 astro-ph.SR

A window on the efficiency of the s-process in AGB stars: chemical abundances of n-capture elements in the planetary nebula NGC 3918

S. Madonna (1 , 2) , J. Garc\'ia-Rojas (1 , V. luridiana (1 , N. C. Sterling (3) , C. Morisset (4) ((1) IAC , Spain , (2) ULL

show 4 more authors

(3) U. West Georgia USA (4) IA-UNAM Mexico)

This is my paper

classification 🌌 astro-ph.SR

keywords chemicallinesnebulaplanetaryabundancesefficiencyelementss-process

0 comments

read the original abstract

The chemical content of the planetary nebula NGC 3918 is investigated through deep, high-resolution (R~40000) UVES at VLT spectrophotometric data. We identify and measure more than 750 emission lines, making ours one of the deepest spectra ever taken for a planetary nebula. Among these lines we detect very faint lines of several neutron-capture elements (Se, Kr, Rb, and Xe), which enable us to compute their chemical abundances with unprecedented accuracy, thus constraining the efficiency of the s-process and convective dredge-up in the progenitor star of NGC 3918.

This paper has not been read by Pith yet.

A window on the efficiency of the s-process in AGB stars: chemical abundances of n-capture elements in the planetary nebula NGC 3918

discussion (0)