June 20, 2024Astronomy and AstrophysicsOpen Access

Evidence for bipolar explosions in Type IIP supernovae

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High continuum polarization with perpendicular angles in Type IIP supernovae reveals a bipolar explosion geometry, separating polar and equatorial ejecta.
Photometric, spectroscopic, and polarimetric observations across multiple events demonstrate two orthogonal polarization angles in plateau phases.
Supporting evidence from nebular spectra and velocity curves highlights aspherical core-collapse supernovae, though full geometric mapping requires validation.

Authors

TNT. NagaoUniversity of Turku KMKeiichi MaedaKyoto University SMS. MattilaUniversity of Turku

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Implication

Observational analysis reveals perpendicular polarization angles in Type IIP supernovae, indicating bipolar ejecta geometry with distinct polar and equatorial components.

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Nagao et al. (2024) studied this question.

synapsesocial.com/papers/68e63e32b6db6435875d0328 https://doi.org/10.1051/0004-6361/202450191

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Implication

Observational analysis reveals perpendicular polarization angles in Type IIP supernovae, indicating bipolar ejecta geometry with distinct polar and equatorial components.

Evidence for bipolar explosions in Type IIP supernovae

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Discussion

Implication

Cite This Study

Evidence for bipolar explosions in Type IIP supernovae

Key Points

Discussion

Implication

Cite This Study

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