Physics of nova outbursts: A theoretical model of classical nova outbursts with self-consistent wind mass loss

We present a model for one cycle of a classical nova outburst based on a self-consistent wind mass loss accelerated by the gradient of radiation pressure, i.e., so-called optically thick winds. Evolution models are calculated by a Henyey code for a 1.0 M-circle dot, white dwarf with a mass-accretion rate of 5 x 10(-9) M-circle dot, yr(-1). The outermost part of the hydrogen-rich envelope is connected to a steadily moving envelope where optically thick winds occur. We confirm that no internal shock waves occur at thermonuclear runaway. The wind mass-loss rate reaches a peak of 1.4 x 10(-4) M-circle dot yr(-1) at the epoch of the maximum photospheric expansion, where the photospheric temperature decreases to log T-ph (K) = 3.90. Almost all of the accreted mass is lost in the wind. The nuclear energy generated in hydrogen burning is lost in a form of photon emission (64%), gravitational energy (lifting up the wind matter against gravity, 35%), and the kinetic energy of the wind (0.23%). A classical nova should be very bright in a far-UV (100-300 angstrom) band for one day just after the onset of thermonuclear runaway (similar to 25 d before the optical maximum). In the decay phase of the nova outburst, the envelope structure is very close to that of a steady-state solution.