A new radiation hydrodynamics code and the simulation of core collapse through the formation of the neutrino- driven wind

Details A new radiation hydrodynamics code and the simulation of core collapse through the formation of the neutrino- driven wind A new radiation hydrodynamics code and the simulation of core collapse through the formation of the neutrino- driven wind

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phdt.......221d&link_type=abstract

Thesis (PhD). FLORIDA ATLANTIC UNIVERSITY, Source DAI-B 65/02, p. 788, Aug 2004, 100 pages.

Computer Science

Scientific paper

This work is a simulation of a 15 solar mass star from initial core collapse through the formation of the neutrino-driven wind with an eye towards a possible site for the r-process. We use a new radiation hydrodynamics code known as RadHyd, which is a merger of EVH-1 and MGFLD. The EVH-1 code is a piecewise parabolic method, or PPM, Godunov solver with Newtonian gravitation and MGFLD is a sophisticated multi-group, flux-limited diffusion radiation transport code. Core collapse is initiated from a progenitor model S15s7b of Weaver and Woosley. A maximum radius of 2.0 × 1011 cm is chosen to retain the shock on the grid for the desired duration of the simulation. The stagnated shock is revived after 300 ms by increasing the internal energy between the shock and the gain radius over a period of 50 ms. Boundary conditions provided by the outward moving shock yield a subsonic wind. The progenitor model is evolved with two different explosion energies (1.5 and 2.5 foes) and two sets of neutrino reaction rates. The first set is the standard set from Bruenn [5], whereas the second contains neutrino-nucleon elastic scattering with nucleon recoil and blocking and nucleon bremsstrahlung. In the analysis, we compare the structure differences caused by the different neutrino rates in the time from bounce to 300 ms after bounce, when the energy addition will take place. Finally, we discuss the further evolution of the model and characterize properties of the neutrino-driven wind for the two sets of rates and explosion energies.

Affiliated with

Also associated with

No associations

Rating

A new radiation hydrodynamics code and the simulation of core collapse through the formation of the neutrino- driven wind does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A new radiation hydrodynamics code and the simulation of core collapse through the formation of the neutrino- driven wind, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A new radiation hydrodynamics code and the simulation of core collapse through the formation of the neutrino- driven wind will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1098040