Gamma‐Ray Lines from Asymmetric Supernovae | Zendy

Aimee Hungerford | Zendy; Chris L. Fryer | Zendy; Michael S. Warren | Zendy

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Gamma‐Ray Lines from Asymmetric Supernovae

Author(s) -

Aimee Hungerford,

Chris L. Fryer,

Michael S. Warren

Publication year - 2003

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/376776

Subject(s) - supernova , physics , line (geometry) , spectral line , astrophysics , distribution function , monte carlo method , asymmetry , series (stratigraphy) , computational physics , astronomy , geometry , geology , paleontology , statistics , mathematics , quantum mechanics

We present 3-dimensional SPH simulations of supernova explosions from 100seconds to 1 year after core-bounce. By extending our modelling efforts to a3-dimensional hydrodynamics treatment, we are able to investigate the effectsof explosion asymmetries on mixing and gamma-ray line emergence in supernovae.A series of initial explosion conditions are implemented, including jet-likeand equatorial asymmetries of varying degree. For comparison, symmetricexplosion models are also calculated. A series of time slices from theexplosion evolution are further analyzed using a 3-dimensional Monte Carlogamma-ray transport code. The emergent hard X- and gamma-ray spectra arecalculated as a function of both viewing angle and time, including trends inthe gamma-ray line profiles. We find significant differences in the velocitydistribution of radioactive nickel between the symmetric and asymmetricexplosion models. The effects of this spatial distribution change are reflectedin the overall high energy spectrum, as well as in the individual gamma-rayline profiles.

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