Helium abundance in Novae |
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| Authors: | I Malakpour |
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| Institution: | 1. Institue of Geophysics, Tehran University, Tehran, Iran
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| Abstract: | The4He abundance of the Nova Delphini 1967 is determined, using their nebular stage spectra, which is of the order 0.18 by number and 0.39 by mass. Our results and similar measurements on other novae show that the4He abundance in novae is about twice the amount predicted by the Big-Bang theory. The binary structure is the main cause of4He overabundance in novae. |
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