Recurrent novae as a consequence of the accretion of solar material onto a 1.38 M-white dwarf

摘要: We have computed three evolutionary sequences which treat the accretion of hydrogen-rich material onto 1.38 M/sub sun/ white dwarfs. In each these accreting matter had only a solar composition CNO nuclei (Z = 0.015). first sequence we utilized an rate 1.7 x 10/sup hyphen8/ yr/sup hyphen1/ dwarf with initial luminosity 0.1 L/sub . It took this '33 yr to reach peak thermonuclear runaway resulted in outburst that ejected 3x10/sup moving at speeds up 2900 kn s/sup hyphen1/. The light curve, time outburst, and amount mass during evolution are excellent agreement observed Nova U Sco 1979. However, 6% accreted envelope was outburst. remaining quickly burned helium ('2 yr) settled back dwarf. second study involved 1.7x10/sup hyphen9/ hyphen2/ nearly 1600 themore » burst phase evolution, by '3x10/sup hyphen6/ Peak temperature shell source reached 3.5x10/sup 8/ K, about 1.3x10/sup K higher than found for model 1. This hyphen7/ sun/, 13% envelope, low velocities. For both sequences, find as result massive dwarf, grows toward Chandrasekhar limit. If our is realistic representation Sco, then star well on its way becoming SN I.« less