dc.date.accessioned | 2018-02-18T11:08:13Z | |
dc.date.available | 2018-02-18T11:08:13Z | |
dc.date.created | 2018-02-05T22:22:45Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Lind, K. Amarsi, A. M. Asplund, M. Barklem, P. S. Bautista, M. Bergemann, M. Collet, R. Kiselman, D. Leenaarts, Jorrit Mendes Domingos Pereira, Tiago . Non-LTE line formation of Fe in late-type stars – IV. Modelling of the solar centre-to-limb variation in 3D. Monthly notices of the Royal Astronomical Society. 2017, 468(4), 4311-4322 | |
dc.identifier.uri | http://hdl.handle.net/10852/60236 | |
dc.description.abstract | Our ability to model the shapes and strengths of iron lines in the solar spectrum is a critical test of the accuracy of the solar iron abundance, which sets the absolute zero-point of all stellar metallicities. We use an extensive 463-level Fe atom with new photoionization cross-sections for Fe i and quantum mechanical calculations of collisional excitation and charge transfer with neutral hydrogen; the latter effectively remove a free parameter that has hampered all previous line formation studies of Fe in non-local thermodynamic equilibrium (NLTE). For the first time, we use realistic 3D NLTE calculations of Fe for a quantitative comparison to solar observations. We confront our theoretical line profiles with observations taken at different viewing angles across the solar disc with the Swedish 1-m Solar Telescope. We find that 3D modelling well reproduces the observed centre-to-limb behaviour of spectral lines overall, but highlight aspects that may require further work, especially cross-sections for inelastic collisions with electrons. Our inferred solar iron abundance is log (εFe) = 7.48 ± 0.04 dex.
© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society | en_US |
dc.language | EN | |
dc.language.iso | en | en_US |
dc.publisher | Blackwell Publishing | |
dc.title | Non-LTE line formation of Fe in late-type stars – IV. Modelling of the solar centre-to-limb variation in 3D | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Lind, K. | |
dc.creator.author | Amarsi, A. M. | |
dc.creator.author | Asplund, M. | |
dc.creator.author | Barklem, P. S. | |
dc.creator.author | Bautista, M. | |
dc.creator.author | Bergemann, M. | |
dc.creator.author | Collet, R. | |
dc.creator.author | Kiselman, D. | |
dc.creator.author | Leenaarts, Jorrit | |
dc.creator.author | Mendes Domingos Pereira, Tiago | |
cristin.unitcode | 185,15,3,0 | |
cristin.unitname | Institutt for teoretisk astrofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1562186 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly notices of the Royal Astronomical Society&rft.volume=468&rft.spage=4311&rft.date=2017 | |
dc.identifier.jtitle | Monthly notices of the Royal Astronomical Society | |
dc.identifier.volume | 468 | |
dc.identifier.issue | 4 | |
dc.identifier.startpage | 4311 | |
dc.identifier.endpage | 4322 | |
dc.identifier.doi | http://dx.doi.org/10.1093/mnras/stx673 | |
dc.identifier.urn | URN:NBN:no-62892 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0035-8711 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/60236/2/stx673.pdf | |
dc.type.version | PublishedVersion | |