Fig. 19.

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Period-luminosity diagram for the ellipsoidal candidates. The colors are based on the primary mass (top panel) and filling factor (bottom panel). We note that both color bars are shown in logarithmic scale. Systems having a filling factor larger than one are shown as unfilled circles. In both panels, the black dashed line corresponds to the fit to the sample of low-mass ellipsoidal variables in Nie et al. (2017).
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