On the total energy output of the nova outburst

Astronomy and Astrophysics – Astronomy

Scientific paper

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Energy Transfer, Novae, Stellar Luminosity, Astronomical Models, Energy Budgets, Light Curve, Stellar Evolution, Stellar Temperature

Scientific paper

It is shown that the postmaximum decline in optical light during the outburst of a normal classical nova is caused by a shift in the wavelength of maximum energy to the ultraviolet. The constant-luminosity phase which was directly observed in Nova FH Ser 1970 may, therefore, be common to all novae, regardless of speed class. This implies that all speed classes of novae have similar energy budgets and that it is the total energy involved in the outburst which produces the variation in the observed characteristics of the novae. Recent thermonuclear runaway models for the outburst also show an extended period of high luminosity and high effective temperature following the initial outburst.

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