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Title: Fast evolving pair-instability supernovae

With an increasing number of superluminous supernovae (SLSNe) discovered the ques- tion of their origin remains open and causes heated debates in the supernova commu- nity. Currently, there are three proposed mechanisms for SLSNe: (1) pair-instability supernovae (PISN), (2) magnetar-driven supernovae, and (3) models in which the su- pernova ejecta interacts with a circumstellar material ejected before the explosion. Based on current observations of SLSNe, the PISN origin has been disfavoured for a number of reasons. Many PISN models provide overly broad light curves and too reddened spectra, because of massive ejecta and a high amount of nickel. In the cur- rent study we re-examine PISN properties using progenitor models computed with the GENEC code. We calculate supernova explosions with FLASH and light curve evolu- tion with the radiation hydrodynamics code STELLA. We find that high-mass models (200 M⊙ and 250 M⊙) at relatively high metallicity (Z=0.001) do not retain hydro- gen in the outer layers and produce relatively fast evolving PISNe Type I and might be suitable to explain some SLSNe. We also investigate uncertainties in light curve modelling due to codes, opacities, the nickel-bubble effect and progenitor structure and composition.
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [5] ;  [9] ;  [10] ;  [11] ;  [12]
  1. Keele Univ. (United Kingdom); Tel Aviv Univ., Ramat Aviv (Israel)
  2. North Carolina State Univ., Raleigh, NC (United States)
  3. Keele Univ. (United Kingdom); Univ. of Tokyo (Japan)
  4. Univ. of Tokyo (Japan); Inst. of Theoretical and Experimental Physics (ITEP), Moscow (Russian Federation); VNIIA, Moscow (Russian Federation)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Max Planck Society, Garching (Germany). Max Planck Inst. for Astrophysik
  7. Univ. of Chicago, IL (United States)
  8. Monash Univ., Melbourne, VIC (Australia); Shanghai Jiao Tong Univ. (China); Univ. of Minnesota, Minneapolis, MN (United States)
  9. Hebrew Univ. of Jerusalem (Israel). Racah Inst. of Physics
  10. Univ. of Tokyo (Japan)
  11. Louisiana State Univ., Baton Rouge, LA (United States)
  12. Univ. of Tokyo (Japan); Inst. of Theoretical and Experimental Physics (ITEP), Moscow (Russian Federation); Moscow State Univ., Moscow (Russian Federation)
Publication Date:
Report Number(s):
Journal ID: ISSN 0035-8711; TRN: US1701569
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Volume: 464; Journal Issue: 3; Journal ID: ISSN 0035-8711
Royal Astronomical Society
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
Country of Publication:
United States
OSTI Identifier: