NIC-XIV School 2016

PUSHING CORE-COLLAPSE SUPERNOVAE TO EXPLOSIONS IN SPHERICAL SYMMETRY: NUCLEOSYNTHESIS YIELDS

15 Jun 2016, 16:30

1h 30m

Library Hall, Central Library (Niigata University (Ikarashi Campus))

Board: 17

Poster Presentation Posters

Speaker

Sanjana Sinha (North Carolina State University)

Description

Core-collapse supernovae are the extremely energetic deaths of massive stars. As such, they play a vital role in the synthesis and dissemination of many heavy elements in the universe. In the past, core-collapse supernova nucleosynthesis calculations have relied on artificial explosion methods that do not adequately capture the physics of the innermost layers of the star. The PUSH method, calibrated against SN1987A, utilizes the energy of heavy-flavor neutrinos emitted by the proto-neutron star (PNS) to trigger parametrized explosions. This makes it possible to follow the consistent evolution of the PNS and to ensure a more accurate treatment of the electron fraction of the ejecta, both of which are critical for nucleosynthesis calculations. Being robust and computationally affordable, this method is an ideal tool for performing extended progenitor studies. Here, nucleosynthesis results for core-collapse supernovae, exploded with PUSH, will be presented for a wide range of progenitor masses. Multiple interesting trends of ejected alpha elements with respect to progenitor compactness, explosion energies and neutron-star remnant masses are found. Comparisons of the calculated yields to observational metal-poor star data will also be presented. These complete nucleosynthesis yield predictions will be immensely useful as an input to galactic chemical evolution models.