Zobrazeno 1 - 10
of 241
pro vyhledávání: '"Bisterzo, S."'
Autor:
Mishenina, T., Pignatari, M., Gorbaneva, T., Bisterzo, S., Travaglio, C., Thielemann, F. K., Soubiran, C.
The enrichment history of heavy neutron-capture elements in the Milky Way disc provides fundamental information about the chemical evolution of our Galaxy and about the stellar sources that made those elements. In this work we give new observational
Externí odkaz:
http://arxiv.org/abs/1901.08955
Autor:
Mishenina, T., Pignatari, M., Cot'e, B., Thielemann, F. -K., Soubiran, C., Basak, N., Gorbaneva, T., Korotin, S. A., Kovtyukh, V. V., Wehmeyer, B., Bisterzo, S., Travaglio, C., Gibson, B. K., Jordan, C., Paul, A., Ritter, C., Herwig, F.
Atmospheric parameters and chemical compositions for ten stars with metallicities in the region of -2.2< [Fe/H] <-0.6 were precisely determined using high resolution, high signal to noise, spectra. For each star the abundances, for 14 to 27 elements,
Externí odkaz:
http://arxiv.org/abs/1705.03642
Autor:
Uberseder, E., Heil, M., Käppeler, F., Lederer, C., Mengoni, A., Bisterzo, S., Pignatari, M., Wiescher, M.
Publikováno v:
Phys. Rev. C 95, 025803 (2017)
The cross section of the $^{23}$Na($n, \gamma$)$^{24}$Na reaction has been measured via the activation method at the Karlsruhe 3.7 MV Van de Graaff accelerator. NaCl samples were exposed to quasistellar neutron spectra at $kT=5.1$ and 25 keV produced
Externí odkaz:
http://arxiv.org/abs/1702.01541
Publikováno v:
The Astrophysical Journal, 2017
The solar s-process abundances have been analyzed in the framework of a Galactic Chemical Evolution (GCE) model. The aim of this work is to implement the study by Bisterzo et al. (2014), who investigated the effect of one of the major uncertainties o
Externí odkaz:
http://arxiv.org/abs/1701.01056
Autor:
Talwar, R., Adachi, T., Berg, G. P. A., Bin, L., Bisterzo, S., Couder, M., deBoer, R. J., Fang, X., Fujita, H., Fujita, Y., Gorres, J., Hatanaka, K., Itoh, T., Kadoya, T., Long, A., Miki, K., Patel, D., Pignatari, M., Shimbara, Y., Tamii, A., Wiescher, M., Yamamoto, T., Yosoi, M.
The $^{22}$Ne($\alpha$,n)$^{25}$Mg reaction is the dominant neutron source for the slow neutron capture process ($s$-process) in massive stars and contributes, together with the $^{13}$C($\alpha$,n)$^{16}$O, to the production of neutrons for the $s$-
Externí odkaz:
http://arxiv.org/abs/1508.05660
We study the s-process abundances (A > 90) at the epoch of the solar-system formation. AGB yields are computed with an updated neutron capture network and updated initial solar abundances. We confirm our previous results obtained with a Galactic Chem
Externí odkaz:
http://arxiv.org/abs/1403.1764
Autor:
Bisterzo, S., Travaglio, C., Wiescher, M., Gallino, R., Kaeppeler, F., Straniero, O., Cristallo, S., Imbriani, G., Goerres, J., deBoer, R. J.
We study the s-process abundances at the epoch of the Solar-system formation as the outcome of nucleosynthesis occurring in AGB stars of various masses and metallicities. The calculations have been performed with the Galactic chemical evolution (GCE)
Externí odkaz:
http://arxiv.org/abs/1311.5381
We provide an updated discussion of the sample of CEMP-s and CEMP-s/r stars collected from the literature. Observations are compared with the theoretical nucleosynthesis models of asymptotic giant branch (AGB) stars presented by Bisterzo et al. (2010
Externí odkaz:
http://arxiv.org/abs/1311.5386
Asymptotic giant branch (AGB) stars with low initial mass (1 - 3 Msun) are responsible for the production of neutron-capture elements through the main s-process (main slow neutron capture process). The major neutron source is 13C(alpha, n)16O, which
Externí odkaz:
http://arxiv.org/abs/1211.4970
We provide an individual analysis of 94 carbon enhanced metal-poor stars showing an s-process enrichment (CEMP-s) collected from the literature. The s-process enhancement observed in these stars is ascribed to mass transfer by stellar winds in a bina
Externí odkaz:
http://arxiv.org/abs/1201.6198