Journal
ASTROPHYSICAL JOURNAL
Volume 805, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/805/1/44
Keywords
dark ages, reionization, first stars; galaxies: high-redshift; infrared: stars; stars: Population III; supernovae: general
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Funding
- European Research Council under the European Community's Seventh Framework Programme (FP7) via the ERC Advanced Grant STARLIGHT: Formation of the First Stars [339177]
- Enrico Fermi Institute
- LANL LDRD Director's Fellowship
- National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
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Population III stars that die as pair-instability supernovae are usually thought to fall in the mass range of 140-260 M-circle dot. But several lines of work have now shown that rotation can build up the He cores needed to encounter the pair instability at stellar masses as low as 90 M-circle dot. Depending on the slope of the initial mass function of Population III stars, there could be 4-5 times as many stars from 90-140 M-circle dot in the primordial universe as in the usually accepted range. We present numerical simulations of the pair-instability explosions of such stars performed with the MESA, FLASH, and RAGE codes. We find that they will be visible to supernova factories such as Pan-STARRS and LSST in the optical out to z similar to 1-2 and to James Webb Space Telescope and the 30 m class telescopes in the near-infrared (NIR) out to z similar to 7-10. Such explosions will thus probe the stellar populations of the first galaxies and cosmic star formation rates in the era of cosmological reionization. These supernovae are also easily distinguished from more massive pair-instability explosions, underscoring the fact that there is far greater variety to the light curves of these events than previously understood.
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