Abstract
view Abstract Citations (2) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Pre-White Dwarf Evolution and the Nuclei of Planetary Nebulae. Vila, Samuel C. Abstract The evolution of stars of masse&~ 1M0. in advanced phases of gravitational contraction has been followed for compositions of high atomic number and including energy losses due to production and escape of neutrinos by the photoneutrino, pair annihilation, and plasma neutrino mechanisms. The neutrino energy loss results in a phase of rapid collapse (~5 X 10~ yr) when the neutrino and optical luminosities as well as the effective temperatures are high (L~103Lo., Lv~102L, log T6ff~S). A comparison with recent work by Harmon and Seaton (Astrophys. J. 140, 824, 1964) suggests the identification of these tracks with their proposed evolution for the nuclei of planetary nebula. This might be used as an argument for the reality of the theory of a universal weak interaction (Feynmann and Gell-Maun, Phys. Rev. 109,193,1958; Sudarshan and Marshak, Phys. Rev. 109, 1960, 1958) responsible for the above neutrino reactions. Publication: The Astronomical Journal Pub Date: 1965 DOI: 10.1086/109836 Bibcode: 1965AJ.....70R.695V full text sources ADS |
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