Elemental abundances in novae
Novae refer to close binary systems, where outbursts occur on the white dwarf surface due to thermonuclear runaway. Numerical simulations of nova explosions have shown that the accreted envelopes attain peak temperature of about $4 \times 10^8$ K. The temperature remains at the peak value for about several hundred seconds; this allows nuclear reactions to take place in the ejecta. Theoretical studies predict significant overproduction of few elements, e.g., 17O, 15N, and 13C, with respect to solar abundances. Spectroscopic observations have also confirmed about high metal abundances in novae ejecta. This paper briefly discusses about elemental abundances in novae ejecta predicted by the nucleosynthesis process as well as that found from observations.
Volume 42, 2021
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