Tag Archives: chemical abundances

Young stars and ionized nebulae in M83: comparing chemical abundances at high metallicity

Fabio Bresolin (1), Rolf-Peter Kudritzki (1), Miguel A. Urbaneja (2), Wolfgang Gieren (3), I-Ting Ho (1), Grzegorz Pietrzynski (3). (1) Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA. (2) Institut für Astro- und Teilchenphysik, Universität … Continue reading

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The Solar oxygen abundance

Martin Asplund (Australian National University, Australia) I will review the solar oxygen abundance. I will also discuss how this relates to helioseismology and the current solar modeling problem. Finally I will present a comparison of the solar O abundance with … Continue reading

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Neon and oxygen in stellar coronae – a unification with the Sun

Jan Robrade (Hamburger Sternwarte, Germany) We use high-resolution X-ray spectra from a sample of weakly and moderately active stars to determine their coronal Ne/O abundance ratio and to investigate an enhanced neon abundance as solution of the solar modeling problem. … Continue reading

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Advances in atomic data for neutron-capture elements

N. C. Sterling (1), M. C. Witthoeft (2), P. C. Stancil (3), D. A. Esteves (4), R. C. Bilodeau (5,6), R. L. Porter (3), A. Aguilar (5) (1) Michigan State U., (2) NASA/GSFC, (3)U. Georgia, (4) U. Colorado, (5) LBNL/ALS, … Continue reading

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Reduce, Reuse, Recycle: PNe as green galactic citizens

Karen Kwitter (Williams College, USA) We review gas-phase abundances in PNe, and describe their dual utility as archives of original progenitor metallicity via the alpha elements, as well as sources of processed material from nucleosynthesis during the star’s evolution, i.e., … Continue reading

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NEAT (Nebular Empirical Analysis Tool): robust uncertainties on nebular abundance estimates

R. Wesson (1), D. Stock (1,2), P. Scicluna (1) (1) Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom. (2) Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada. … Continue reading

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