Hydrogen shell flashes in a white dwarf with mass accretion

摘要: The evolution of a 0.8 M/sub sun/ white dwarf accreting hydrogen-rich matter (X=0.7,Z=0.03) was studied with model computations. Accretion rates in the range 1.46 x 10/sup -11/ to 1.067 -7/ yr/sup -1/ gave rise hydrogen shell flashes interflash periods 1.2 7/ 1.7 2/ yr. During flash cycle star one two states: high state lasting about 50 yr which as bright red giant degenerate core and luminosity due burning, low lasted for rest where cooling core. kinetic energy flux accreted neglected, even though it exceeded when state. significant fraction may be form X-rays.We believe that our models are not relevant novae or is through disk. Our account variability hot component ofmore » some symbiotic stars.Hydrogen burning stable accretion 2.7 -1/. Higher lead envelope expansion formation core.« less