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- W2108264928 abstract "Stars with helium cores between ~64 and 133 M_sun are theoretically predicted to die as pair-instability supernovae. This requires very massive progenitors, which are theoretically prohibited for Pop II/I stars within the Galactic stellar mass limit due to mass loss via line-driven winds. However, the runaway collision of stars in a dense, young star cluster could create a merged star with sufficient mass to end its life as a pair-instability supernova, even with enhanced mass loss at non-zero metallicity. We show that the predicted rate from this mechanism is consistent with the inferred volumetric rate of roughly ~2x10^-9 Mpc^-3 yr^-1 of the two observed pair-instability supernovae, SN 2007bi and PTF 10nmn, neither of which have metal-free host galaxies. Contrary to prior literature, only pair-instability supernovae at low redshifts z<2 will be observable with the Large Synoptic Survey Telescope (LSST). We estimate the telescope will observe ~10^2 such events per year that originate from the collisional runaway mergers in clusters." @default.
- W2108264928 created "2016-06-24" @default.
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- W2108264928 date "2012-05-01" @default.
- W2108264928 modified "2023-10-16" @default.
- W2108264928 title "Pair-instability supernovae via collision runaway in young dense star clusters" @default.
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- W2108264928 doi "https://doi.org/10.1111/j.1365-2966.2012.21030.x" @default.
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