Abstract
W UMa stars consist of two main sequence stars touching each other. Mass and energy is transferred from the primary star to the secondary one throughout the neck between the stars. The rate of the energy transfer is studied. The energy transfer rate depends on the mass and luminosity ratio. A new group of W UMa-type stars is introduced: it is called H-subtype systems meaning high mass ratio systems. They have a mass ratio larger than 0.72 and a different energy transfer rate relation than other types of W UMa systems.
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Csizmadia, S. Energy Transfer in W UMa Systems. Astrophys Space Sci 296, 185–188 (2005). https://doi.org/10.1007/s10509-005-4441-z
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DOI: https://doi.org/10.1007/s10509-005-4441-z