Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.131..431p&link_type=abstract
Astrophysics and Space Science, Volume 131, Issue 1-2, pp. 431-435
Astronomy and Astrophysics
Astrophysics
Scientific paper
A classical nova model was evolved through a complete cycle, i.e. accretion leading to cutburst, mass loss and again accretion, ending in another outburst, by means of an implicit Lagrangian hydrodynamic code, which included diffusion (concentration, pressure and thermal terms), as well as an extensive nuclear reactions network between 28 isotopes of C, N, O, F, Ne, Na, Mg and Al. The initial model was a 1.25 M&sun; C-O white dwarf (WD) and the accretion rate assumed was 10-11 M&sun;/yr. For more details of this calculation, see Prialnik (1986). The accreted matter was assumed to have normal composition (X=0.70, Z=0.03). Nevertheless, due to diffusion and convection, a significant amount of core material was mixed into the accreted matter, raising Z by a factor of 10. The model's evolution closely resembled that of a fast nova eruption, with a peak bolometric luminosity of 2.9×105 L&sun;, a time of decline by 3m of 25 days, an ejected mass of 6.5×10-6 M&sun; and a maximum velocity of 3800 km/sec.
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