2006
DOI: 10.1086/498500
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Abstract: Those massive stars that give rise to gamma-ray bursts (GRBs) during their deaths must be endowed with an unusually large amount of angular momentum in their inner regions, 1-2 orders of magnitude greater than the ones that make common pulsars. Yet the inclusion of mass loss and angular momentum transport by magnetic torques during the precollapse evolution is known to sap the core of the necessary rotation. Here we explore the evolution of very rapidly rotating massive stars, including stripped-down helium co… Show more

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Cited by 893 publications
(1,180 citation statements)
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“…This effect is largely due to the enrichment with metals over time but the metal enrichment of galaxies is also a complex function of star-formation efficiency and feedback with the intergalactic medium. GRB hosts fall below the mass-metallicity relation for field (SDSS) galaxies (Han et al, 2010;Kocevski & West, 2011) which had been taken as evidence for GRB hosts being biased towards lower metallicities, possibly because GRBs need low-metallicity environments (Woosley & Heger, 2006). However, Mannucci et al (2010) established a connection between metallicity and star-formation rate showing that star-forming galaxies have on average lower metallicities, which can explain part of the discrepancy to field galaxies (Kocevski & West, 2011).…”
Section: The Mass-metallicity Relation At High Redshiftsmentioning
confidence: 99%
“…This effect is largely due to the enrichment with metals over time but the metal enrichment of galaxies is also a complex function of star-formation efficiency and feedback with the intergalactic medium. GRB hosts fall below the mass-metallicity relation for field (SDSS) galaxies (Han et al, 2010;Kocevski & West, 2011) which had been taken as evidence for GRB hosts being biased towards lower metallicities, possibly because GRBs need low-metallicity environments (Woosley & Heger, 2006). However, Mannucci et al (2010) established a connection between metallicity and star-formation rate showing that star-forming galaxies have on average lower metallicities, which can explain part of the discrepancy to field galaxies (Kocevski & West, 2011).…”
Section: The Mass-metallicity Relation At High Redshiftsmentioning
confidence: 99%
“…However, the envelope ram pressure would prevent the jet and wind from penetrating outward into the collapsing stellar envelope, so we consider the pressure competition between the jet/wind and the infalling envelope. To clarify the origin of the observed diversities in GRB-SNe, we perform simulations for various progenitor models with different angular momentum while the progenitor mass is fixed (14M ⊙ ) [7]. Fig.…”
Section: Methodsmentioning
confidence: 99%
“…Since high-metallicity stars are expected to have significant mass-loss by winds, leading to the loss of their angular momentum, this suggests that GRB progenitors should have metallicities less than 1/10 solar (Hirschi et al 2005;Langer & Norman 2006;Woosley & Heger 2006). The observations of GRB hosts at z < 1 do seem to show a bias toward lowmetallicities.…”
Section: Metallicitymentioning
confidence: 99%