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14 June 2024
 
  » arxiv » 2302.00298

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Light curve modeling of four short-period W UMa binaries
Atila Čeki ; Olivera Latković ;
Date 1 Feb 2023
AbstractWe use extensive model grids to estimate the global parameters of four partially-eclipsing W UMa contact binaries near the period cutoff. All four systems consist of K-type main sequence primaries and M-type secondaries that appear undersized and underluminous for their masses because of the energy transfer through the common envelope. Three of the four stars exhibit light curve asymmetry that is explained in terms of magnetic activity and modeled with dark spots. We discuss the reliability of the photometric mass ratios and derived absolute parameters in context of total or partial eclipses and compare them with a sample of totally-eclipsing short-period W UMa systems from the literature.
Source arXiv, 2302.00298
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