Pair-instability supernovae via collision runaway in young dense star clusters
| Autor: | Abraham Loeb, Tony S. Pan, Daniel Kasen |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Physics
010504 meteorology & atmospheric sciences Stellar mass Astrophysics::High Energy Astrophysical Phenomena Metallicity Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Large Synoptic Survey Telescope 01 natural sciences Galaxy Redshift Supernova Stars Star cluster 13. Climate action Space and Planetary Science 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 423:2203-2208 |
| ISSN: | 0035-8711 |
| DOI: | 10.1111/j.1365-2966.2012.21030.x |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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