出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The neutrino-driven wind from a nascent neutron star at the center of a supernova expands into
the earlier ejecta of the explosion. Upon collision with this slower matter the wind material is
decelerated in a wind termination shock. By means of hydrodynamic simulations in spherical
symmetry we demonstrate that this can lead to a large increase of the wind entropy, density,
and temperature, and to a strong deceleration of the wind expansion. The consequences of this
phenomenon for the possible r-process nucleosynthesis in the late wind still need to be explored
in detail. Two-dimensional models show that the wind-ejecta collision is highly anisotropic and
could lead to a directional dependence of the nucleosynthesis even if the neutrino-driven wind
itself is spherically symmetric.
