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Monthly Archives: January 2012
Comparison of Fe and Ni opacity calculations for a better understanding of pulsating stellar envelopes
D. Gilles (a), S. Turck-Chièze (a), G. Loisel (a), L. Piau (a), J.-E. Ducret (a), M. Poirier (b), T. Blenski (b), F. Thais (b), C. Blancard (c), P. Cossé (c), G. Faussurier (c), F. Gilleron (c), J.C. Pain (c), Q. … Continue reading
Iron and nickel spectral opacity calculations in conditions relevant for pulsating stellar envelopes and experiments
D. Gilles (1), S. Turck-Chièze (1), M. Busquet (2), F. Thais (3), G. Loisel (4), L. Piau (1), J.E. Ducret (1), T. Blenski (3), C. Blancard (5), P. Cossé (5), G. Faussurier, F. Gilleron (5), J.C. Pain (5), Q. Porcherot (5), J.A. … Continue reading
Posted in Atomic data production
Tagged experiment, iron, nickel, opacities, pulsating stars
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New OPAS opacities for a solar mixture
Claudio Mendoza (IVIC/CeCalCULA, Venezuela) In the recent paper “Solar mixture opacity calculations using detailed configuration and level accounting treatments” by Christophe Blancard (1, 2), Philippe Cossé (1) & Gérald Faussurier (1) ((1) CEA, DAM, DIF, F-91297 Arpajon, France; (2) Observatoire de Paris, … Continue reading
Posted in Atomic data applications, Atomic data production
Tagged OP, opacities, OPAL, OPAS, solar interior
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Estimating turbulent velocities in the elliptical galaxies NGC 5044 and NGC 5813
J. de Plaa (1), I. Zhuravleva (2), N. Werner (3), J. S. Kaastra (1, 4), E. Churazov (2, 5), R. K. Smith (6), A. J. J. Raassen (1), and Y. G. Grange (1) (1) SRON Netherlands Institute for Space Research, … Continue reading
Posted in Atomic data applications
Tagged atomic data, elliptical galaxies, Turbulent velocites
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Electron impact excitation of H-like, He-like and Li-like ions with Z ≤ 30
K. M. Aggarwal and F. P. Keenan (Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University, Belfast BT7 1NN, Northern Ireland, UK) Atomic data, namely energy levels, radiative rates (A-values), and excitation rates or equivalently the effective collision strengths … Continue reading
Posted in Atomic data production
Tagged atomic data, electrom impact excitation, H-like ions, He-like ions, Li-like ions
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Fluorescence and resonant ionization in astrophysical plasmas, with emphasis on and examples from the star Eta Carinae
Henrik Hartman (Lund Observatory, Lund University, Sweden) Following the initial detection by Bowen in 1934 of the strong O III lines being due to accidental resonance with strong He II radiation, many strong spectral emission lines are explained as produced by … Continue reading
Posted in Atomic data applications
Tagged astrophysical plasmas, Eta Carinae, resonance processes
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Data-intensive profile for the VAMDC
C. Mendoza (1,2) and VAMDC Collaboration ((1)Centro de Física, IVIC, Caracas; (2) CeCalCULA, CPTM, Mérida, Venezuela). Preprint Atomic and molecular (A&M) data are required in a wide variety of scientific fields (astrophysics, fusion plasmas, atmospheric physics and chemistry, environmental studies and … Continue reading
Posted in Atomic databases
Tagged atomic databases, e-science, VAMDC, virtual data center, XSAMS
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Photoionization, Photoexcitation, and Astrophysical Opacities: The Iron Project
Sultana N. Nahar (Astronomy Dept., Ohio State University, Columbus, OH 4210, USA) Presentation Radiation transport through astrophysical plasmas is carried out by photon absorptions and emissions by the elements in the plasma and gives a measure of the plasma opacity. The … Continue reading
Recent Progress in the Investigation of Radiative Parameters of Heavy Elements (Z > 37)
É. Biémont (1,2) ((1)IPNAS, University of Liège, B-4000 Liège, Belgium; (2)Astrophysics and Spectroscopy, University of Mons-UMONS, B-7000 Mons, Belgium) Presentation Frequently, the investigation of the atomic structure of the lanthanide ions is prevented by the complexity of the configurations involved … Continue reading
Posted in Atomic data production, Atomic databases
Tagged A-values, atomic databases, heavy elements, Lanthanides, radiative data
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