Masses of binary components in confirmed symbiotic stars. Upper panel: Masses of symbiotic giants (gray). The vertical red dashed line indicates the median value of 1.5 M_⊙. Systems showing recurrent nova outbursts, including V407 Cyg, are shown in dark green. Lower panel: Distribution of symbiotic white-dwarf masses (gray). The vertical red dashed line marks the median value of 0.6 M⊙. Systems with recurrent nova outbursts are shown in dark green.