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BRASS Prerelease 2019

BRASS Rationale

The Belgian Repository of Atomic data and Stellar Spectra - BRASS is a Networking Project of the Belgian Federal Science Policy Office - The Project is a large scientific collaboration on astrophysics research of the Royal Observatory of Belgium (ROB), University of Leuven (KUL), European Southern Observatory (ESO) at Paranal, Chile, and Université Libre de Bruxelles (ULB). The follow-up committee also involves the University of Antwerp (UA) and the Vereniging voor Sterrenkunde (VVS) in the BRASS project. The BRASS project started Dec 2014. It also involved a PhD program completed in Sep 2019.

BRASS takes a first, although crucial, step towards removing all systematic errors in atomic input data required for quantitative stellar spectroscopy. BRASS will thoroughly assess the quality of fundamental atomic data available in the largest repositories by comparing very high-quality observed stellar spectra with state-of-the-art theoretical spectra. Whereas this type of study has currently been carried out for very few stars at the time, and mostly limited to comparable spectral types assembled from various sources, BRASS will combine, analyze, and offer the community the first uniform large collection of benchmark and reference stars. This study will be more complete than any other to date in terms of coverage of the stellar parameter space, as well as the spectral wavelength coverage.

More information about the context, major research questions, methodology, impact on science and technology, interdisciplinary, and expected outcome of BRASS is online available here.

View a BRASS screenshot.