The study of resonant variability observed in the massive LMC system BI 108
Zbigniew Ko{\l}aczkowski, Ronald Mennickent, Thomas Rivinius
TL;DR
This paper investigates the unique 3:2 resonant variability in the massive LMC system BI 108, combining photometric and spectroscopic data to understand its unusual behavior.
Contribution
It presents the first detailed analysis of BI 108's resonant variability and reports novel spectroscopic observations of its complex system behavior.
Findings
Two strong periods in a strict 3:2 resonance
Coherent variability over multiple seasons
Unusual spectroscopic behavior not seen in similar systems
Abstract
The LMC star BI 108 is photometrically variable with the unique light curve: Two strong periods are present in a strict 3:2 resonance, staying coherent over several observing seasons. A spectroscopic data collected at VLT/UVES reveals unexpected and still not fully understood behavior of the system, that has not been observed in any other early-type multiple systems.
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Stellar, planetary, and galactic studies · Astronomy and Astrophysical Research