caa a22 4500 445345764 CHVBK 20180317142828.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s11207-010-9541-4 doi (NATIONALLICENCE)springer-10.1007/s11207-010-9541-4 Solar Chemical Abundances Determined withaCO5BOLD 3D Model Atmosphere [Elektronische Daten] [E. Caffau, H.-G. Ludwig, M. Steffen, B. Freytag, P. Bonifacio] In the last decade, the photospheric solar metallicity as determined from spectroscopy experienced a remarkable downward revision. Part of this effect can be attributed to an improvement of atomic data and the inclusion of NLTE computations, but also the use of hydrodynamical model atmospheres seemed to play a role. This "decrease” with time of the metallicity of the solar photosphere increased the disagreement with the results from helioseismology. With a CO 5 BOLD 3D model of the solar atmosphere, the CIFIST team at the Paris Observatory re-determined the photospheric solar abundances of several elements, among them C, N, and O. The spectroscopic abundances are obtained by fitting the equivalent width and/or the profile of observed spectral lines with synthetic spectra computed from the 3D model atmosphere. We conclude that the effects of granular fluctuations depend on the characteristics of the individual lines, but are found to be relevant only in a few particular cases. 3D effects are not responsible for the systematic lowering of the solar abundances in recent years. The solar metallicity resulting from this analysis is Z=0.0153, Z/X=0.0209. Springer Science+Business Media B.V., 2010 Sun: abundances nationallicence Sun: photosphere nationallicence Line: formation nationallicence Hydrodynamics nationallicence Convection nationallicence Radiative transfer nationallicence Caffau E. GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92195, Meudon Cedex, France aut Ludwig H.-G GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92195, Meudon Cedex, France aut Steffen M. Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482, Potsdam, Germany aut Freytag B. CRAL, UMR 5574: CNRS, Université de Lyon, École Normale Supérieure de Lyon, 46 allée d'Italie, 69364, Lyon Cedex 7, France aut Bonifacio P. GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92195, Meudon Cedex, France aut Solar Physics Springer Netherlands 268/2(2011-02-01), 255-269 0038-0938 268:2<255 2011 268 11207 https://doi.org/10.1007/s11207-010-9541-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-010-9541-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Caffau E. GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92195, Meudon Cedex, France aut NATIONALLICENCE 700 1- Ludwig H.-G GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92195, Meudon Cedex, France aut NATIONALLICENCE 700 1- Steffen M. Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482, Potsdam, Germany aut NATIONALLICENCE 700 1- Freytag B. CRAL, UMR 5574: CNRS, Université de Lyon, École Normale Supérieure de Lyon, 46 allée d'Italie, 69364, Lyon Cedex 7, France aut NATIONALLICENCE 700 1- Bonifacio P. GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92195, Meudon Cedex, France aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 268/2(2011-02-01), 255-269 0038-0938 268:2<255 2011 268 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer