We demonstrate that plasmon neutrinos are the dominant form of energy loss in model white dwarf stars down to T _ { eff } \sim 25 , 000 K , depending on the stellar mass .
The lower end of this range overlaps the observed temperatures for the V777 Her star ( DBV ) instability strip .
The evolution of white dwarfs at these temperatures is driven predominantly by cooling , so this directly affects the stellar evolutionary timescale in proportion to the ratio of the neutrino energy loss to the photon energy loss .
This evolutionary timescale is observable through the time rate of change of the pulsation periods .
Although the unified electro-weak theory of lepton interactions that is crucial for understanding neutrino production has been well tested in the high energy regime , the approach presented here should result in an interesting low-energy test of the theory .
We discuss observational strategies to achieve this goal .