An aspherical distribution for the explosive burning ash of core-collapse supernovae

Qiliang Fang*, Keiichi Maeda*, Hanindyo Kuncarayakti, Takashi Nagao

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

3 Sitaatiot (Scopus)

Abstrakti

It is widely believed that asphericity in the explosion is the crucial ingredient leading to successful core-collapse (CC) supernovae. However, direct observational evidence for the explosion geometry and for the connection with the progenitor properties are still missing. Based on the thus-far largest late-phase spectroscopic sample of stripped-envelope CC supernovae, we demonstrate that about half of the explosions exhibit a substantial deviation from sphericity. For these aspherical CC supernovae, the spatial distributions of the oxygen-burning ash and the unburnt oxygen, as traced by the profiles of [Ca ii] λλ7291,7323 and [O i] λλ6300,6363 emissions, respectively, appear to be anticorrelated, which can be explained if the explosion is bipolar and the oxygen-rich material burnt into two detached iron-rich bubbles. Our combined analysis of the explosion geometry and the progenitor mass further suggests that the degree of asphericity grows with the mass of the carbon–oxygen core, which may be used to guide state-of-the-art simulations of CC supernova explosions.

AlkuperäiskieliEnglanti
Sivut111-118
Sivumäärä8
JulkaisuNature Astronomy
Vuosikerta8
Numero1
Varhainen verkossa julkaisun päivämäärä2023
DOI - pysyväislinkit
TilaJulkaistu - tammik. 2024
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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