Monthly Archives: November 2011

Collision rates and the determination of atmospheric parameters

Posted on November 29, 2011 by AstroAtom

Claudio Mendoza (IVIC/CeCalCULA) The difficulties to obtain accurate atomic data for astrophysical applications are well known, and perhaps reinforced in the many entries in this forum. But we have not come across discrepancies of six orders of magnitude in atomic data until the … Continue reading →

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Quality Control for Theoretical Data in the Virtual Observatory: Establishing Benchmark Tests for Synthetic Spectra

Posted on November 28, 2011 by AstroAtom

Thomas Rauch, Ellen Rigat (Institute for Astronomy and Astrophysics, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Tuebingen, Germany) The Virtual Observatory (VO) provides access to both, data and theory. Quality control is a general problem and the … Continue reading →

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Charge Exchange X-ray Emission of Nearby Star-forming Galaxies

Posted on November 28, 2011 by AstroAtom

Jiren Liu (1), Q. Daniel Wang (2), Shude Mao (3) ((1) National Astronomical Observatories, Chinese Academy of Sciences, Beijing,  China (2) Department of Astronomy, University of Massachusetts, Amherst, MA, USA (3) Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester,  … Continue reading →

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IrOnIc: How to Consider Hundreds of Millions of Iron-Group Lines in NLTE Model-Atmosphere Calculations

Posted on November 28, 2011 by AstroAtom

Ellen Ringat (Institute for Astronomy and Astrophysics, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Tuebingen, Germany) Iron-group elements have a very high number of atomic levels and an overwhelming number of spectral lines. No NLTE model-atmosphere code … Continue reading →

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Neon Insights from Old Solar X-rays: a Plasma Temperature Dependence of the Coronal Neon Content

Posted on November 22, 2011 by AstroAtom

J.J. Drake (Smithsonian Astrophysical Observatory) An analysis using modern atomic data of fluxes culled from the literature for O VIII and Ne IX lines observed in solar active regions by the P78 and Solar Maximum Mission satellites confirms that the coronal … Continue reading →

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Testing EUV/X-ray Atomic Data for the Solar Dynamics Observatory

Posted on November 22, 2011 by AstroAtom

Paola Testa (1), Jeremy J. Drake (1), Enrico Landi (2) ((1) Smithsonian Astrophysical Observatory, (2) Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor) The Atmospheric Imaging Assembly (AIA) and the Extreme-ultraviolet Variability Experiment (EVE) onboard the Solar … Continue reading →

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Comprehensive wavelengths and energy levels of Fe II, Cr II and other iron-group elements using Fourier transform and grating spectroscopy

Posted on November 16, 2011 by AstroAtom

Gillian Nave & Craig J.Sansonet (NIST) Talk given at the NASA Anuual UV-Vis SR&T Workshop, NASA Headquartes, 20-21 September 2011.

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