Can very massive stars avoid Pair-instability Supernovae?

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dc.creatorEkström, S.
dc.creatorMeynet, G.
dc.creatorMaeder, A.
dc.date2007-09-03
dc.date.accessioned2026-07-07T11:19:03Z
dc.date.available2026-07-07T11:19:03Z
dc.descriptionVery massive primordial stars ($140 M_{\odot} < M < 260 M_{\odot}$) are supposed to end their lives as pair-instability supernovae. Such an event can be traced by a typical chemical signature in low metallicity stars, but at the present time, this signature is lacking in the extremely metal-poor stars we are able to observe. Does it mean that those very massive objects did not form, contrarily to the primordial star formation scenarios? Could they avoid this tragical fate? We explore the effects of rotation, anisotropic mass loss and magnetic fields on the core size of a very massive Population III model, in order to check if its mass is sufficiently modified to prevent the pair instability. We obtain that a Population III model of $150 M_{\odot}$ with $\upsilon/\upsilon_{\rm crit}=0.56$ computed with the inclusion of wind anisotropy and Tayler-Spruit dynamo avoids the pair instability explosion.
dc.descriptionto be published in the conference proceedings of First Stars III, Santa Fe, 2007
dc.identifierhttps://arxiv.org/abs/0709.0202
dc.identifierhttp://arxiv.org/abs/0709.0202
dc.identifierAIPConf.Proc.990:220-224,2008
dc.identifierdoi:10.1063/1.2905547
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193553
dc.subjectAstrophysics
dc.titleCan very massive stars avoid Pair-instability Supernovae?
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