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Magnetorotational supernovae: a nucleosynthetic analysis of sophisticated 3D models

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Magnetorotational supernovae: a nucleosynthetic analysis of sophisticated 3D models

dc.contributor.author	Reichert, Moritz
dc.contributor.author	Obergaulinger, M.
dc.contributor.author	Aloy Toras, Miguel Angel
dc.contributor.author	Gabler, M.
dc.contributor.author	Arcones, A.
dc.contributor.author	Thielemann, F. K.
dc.date.accessioned	2023-05-03T10:39:47Z
dc.date.available	2023-05-03T10:39:47Z
dc.date.issued	2023
dc.identifier.citation	Reichert, Moritz Obergaulinger, M. Aloy Toras, Miguel Angel Gabler, M. Arcones, A. Thielemann, F. K. 2023 Magnetorotational supernovae: a nucleosynthetic analysis of sophisticated 3D models Monthly Notices of the Royal Astronomical Society 518 1 1557 1583
dc.identifier.uri	https://hdl.handle.net/10550/86303
dc.description.abstract	Magnetorotational supernovae are a rare type of core-collapse supernovae where the magnetic field and rotation play a central role in the dynamics of the explosion. We present the post-processed nucleosynthesis of state-of-the-art neutrino-MHD supernova models that follow the post explosion evolution for few seconds. We find three different dynamical mechanisms to produce heavy r-process elements: (i) a prompt ejection of matter right after core bounce, (ii) neutron-rich matter that is ejected at late times due to a reconfiguration of the protoneutronstar shape, (iii) small amount of mass ejected with high entropies in the centre of the jet. We investigate total ejecta yields, including the ones of unstable nuclei such as 26Al, 44Ti, 56Ni, and 60Fe. The obtained 56Ni masses vary between 0.01−1M⊙. The latter maximum is compatible with hypernova observations. Furthermore, all of our models synthesize Zn masses in agreement with observations of old metal-poor stars. We calculate simplified light curves to investigate whether our models can be candidates for superluminous supernovae. The peak luminosities obtained from taking into account only nuclear heating reach up to a few ∼1043ergs−1. Under certain conditions, we find a significant impact of the 66Ni decay chain that can raise the peak luminosity up to ∼38 percent compared to models including only the 56Ni decay chain. This work reinforces the theoretical evidence on the critical role of magnetorotational supernovae to understand the occurrence of hypernovae, superluminous supernovae, and the synthesis of heavy elements.
dc.language.iso	eng
dc.relation.ispartof	Monthly Notices of the Royal Astronomical Society, 2023, vol. 518, num. 1, p. 1557-1583
dc.subject	Astronomia
dc.subject	Astrofísica
dc.title	Magnetorotational supernovae: a nucleosynthetic analysis of sophisticated 3D models
dc.type	journal article
dc.date.updated	2023-05-03T10:39:48Z
dc.identifier.doi	10.1093/mnras/stac3185
dc.identifier.idgrec	157918
dc.rights.accessRights	open access