Bibcode
García-Rojas, J.; Madonna, S.; Luridiana, V.; Sterling, N. C.; Morisset, C.
Referencia bibliográfica
Highlights of Spanish Astrophysics VIII, Proceedings of the XI Scientific Meeting of the Spanish Astronomical Society held on September 8-12, 2014, in Teruel, Spain, ISBN 978-84-606-8760-3. A. J. Cenarro, F. Figueras, C. Hernández-Monteagudo, J. Trujillo Bueno, and L. Valdivielso (eds.), p. 476-481
Fecha de publicación:
5
2015
Número de citas
0
Número de citas referidas
0
Descripción
We present deep, high-resolution (R˜40000) UVES at VLT
spectrophotometric data of the planetary nebula NGC 3918. This is one of
the deepest spectra ever taken of a planetary nebula. We have identified
and measured more than 700 emission lines and, in particular, we have
detected very faint lines of several neutron-capture elements (s-process
elements: Kr, Xe and Rb) that enable us to compute their chemical
abundances with unprecedented accuracy, thus constraining the efficiency
of the s-process and convective dredge-up.