12,660 Spotted Stars toward the OGLE Galactic Bulge Fields

@article{Iwanek201912660SS,
title={12,660 Spotted Stars toward the OGLE Galactic Bulge Fields},
author={Patryk Iwanek and Igor Soszy'nski and Jan Skowron and Andrzej Udalski and Kazimierz Stȩpień and Szymon Kozłowski and Przemysław Mr{\'o}z and Radosław Poleski and Dorota M. Skowron and Michal K. Szyma'nski and Paweł Pietrukowicz and Krzysztof Ulaczyk and Łukasz Wyrzykowski and K. Kruszyńska and Krzysztof Rybicki},
journal={The Astrophysical Journal},
year={2019}
}
• Published 13 March 2019
• Physics
• The Astrophysical Journal
We present the discovery and statistical analysis of $12\;660$ spotted variable stars toward and inside the Galactic bulge from over two-decade-long Optical Gravitational Lensing Experiment (OGLE) data. We devise a new method of dereddening of individual stars toward the Galactic bulge where strong and highly nonuniform extinction is present. In effect, $11\;812$ stars were classified as giants and $848$ as dwarfs. Well defined correlations between the luminosity, variability amplitude and…
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