The Belgian Repository of fundamental Atomic data and Stellar Spectra (BRASS)
| Autor: | Thibault Merle, Ch. Martayan, M. Van der Swaelmen, P. A. M. van Hoof, E. Thienpont, Mario David, M. Laverick, Herman Hensberge, Pierre Royer, Alex Lobel |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
atomic line data
Nuclear and High Energy Physics Computer science Astrophysics Physics Atomic Molecular & Chemical 01 natural sciences Astronomical spectroscopy Spectral line Brass atomic and spectral databases Quality (physics) 0103 physical sciences Radiative transfer Astrophysics::Solar and Stellar Astrophysics lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Spectroscopy 010306 general physics 010303 astronomy & astrophysics Line (formation) Physics Science & Technology quantitative stellar spectroscopy Astronomy and Astrophysics Condensed Matter Physics Atomic and Molecular Physics and Optics Computational physics Stars spectral lines Space and Planetary Science Homogeneous visual_art Physical Sciences visual_art.visual_art_medium lcsh:QC770-798 NIST Electron configuration Equivalent width Atomic data |
| Zdroj: | ATOMS Atoms Volume 7 Issue 4 Atoms, Vol 7, Iss 4, p 105 (2019) Proceedings of the International Astronomical Union |
| ISSN: | 1743-9213 |
| Popis: | Background: BRASS (Belgian Repository of Fundamental Atomic Data and Stellar Spectra) is an international networking project for the development of a new public database providing accurate fundamental atomic data of vital importance for stellar spectroscopic research. We present an overview of research results obtained in the past four years. Methods: The BRASS database offers atomic line data we thoroughly tested by comparing theoretical and observed stellar spectra. We perform extensive quality assessments of selected atomic input data using advanced radiative transfer spectrum synthesis calculations, which we compare to high-resolution Mercator-HERMES and ESO-VLT-UVES spectra of F-, G-, and K-type benchmark stars observed with very high signal-to-noise ratios. We have retrieved about half a million atomic lines required for our detailed spectrum synthesis calculations from the literature and online databases such as VAMDC, NIST, VALD, CHIANTI, Spectr-W 3 , TIPbase, TOPbase, SpectroWeb. Results: The atomic datasets have been cross-matched based on line electronic configuration information and organized in a new online repository called BRASS. The validated atomic data, combined with the observed and theoretical spectra are also interactively offered in BRASS. The combination of these datasets is a novel approach for its development providing a universal reference for advanced stellar spectroscopic research. Conclusion: We present an overview of the BRASS Data Interface developments allowing online user interaction for the combined spectrum and atomic data display, line identification, atomic data accuracy assessments including line log(gf)-values, and line equivalent width measurements. |
| Databáze: | OpenAIRE |
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