13-17 June 2016
Niigata University (Ikarashi Campus)
Asia/Tokyo timezone

MIXING OF NI-56 IN MULTIDIMENSIONAL PAIR-INSTABILITY SUPERNOVA SIMULATIONS

15 Jun 2016, 16:30
1h 30m
Library Hall, Central Library (Niigata University (Ikarashi Campus))

Library Hall, Central Library

Niigata University (Ikarashi Campus)

Central Library, Niigata University (Ikarashi Campus), 8050 Ikarashi 2-nocho, Nishi-ku Niigata City, 950-2181, Japan
Board: 18
Poster Presentation Posters

Speaker

Mr Matthew Gilmer (North Carolina State University)

Description

Matthew Gilmer1, Alexandra Kozyreva2, Raphael Hirschi2, Carla Frohlich1 1 North Carolina State University, Raleigh, NC 27695-8202 2 Astrophysics group, Keele University, Keele, Staffordshire, ST5 5BG, UK The new highly diverse class of supernovae, Super Luminous Supernovae (SLSNe), along with observations of Very Massive Stars (VMS) in the Local Universe have helped to revive interest in Pair-Instability Supernovae (PISNe; originally postulated in 1967) over the last decade. While PISN models have had no trouble explaining the enormous amount of light that defines a SLSN, they have heretofore been unable to reproduce the light curve shape and spectral evolution seen in such events. The majority of SLSNe evolve too fast and/or are too blue in color to be matched with existing PISN model predictions. However, our work indicates that certain slowly-evolving hydrogen-poor SLSNe, such as PTF12dam (one of many recent events with similar properties), might be explained by the PISN of a stripped carbon-oxygen core with considerable mixing of radioactive nickel in the ejecta. Here we present 1D, 2D, and 3D hydrodynamical simulations of PISNe computed with FLASH in order to study the effects of natural mixing of nickel on the light curve shape. We use as inputs stellar models of VMS evolved with the GENEVA code. The light curves are calculated with radiation-hydrodynamics code STELLA and comparisons are made to observations of SLSNe.

Primary author

Mr Matthew Gilmer (North Carolina State University)

Presentation Materials

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