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Superluminous supernova SN 2018ibb: Circumstellar shell and spectral effects

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arxiv 2410.17580 v1 pith:SCWDR6SD submitted 2024-10-23 astro-ph.HE

classification astro-ph.HE
keywords supernovadoubletshellcircumstellarcirsumstellareffectsemissionenvelope
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I explore observational effects of the cirsumstellar gas around superluminous supernova SN~2018ibb. High velocity Fe II narrow absorptions are reproduced in the model of fragmented cold dense shell. Unusual selective absorption in the emission doublet of [O I] is explained as an effect of the radiation scattering in Si II doublet lines in the supernova envelope.The strong emission of [O III] doublet at t_max + 565 days is proposed to originate from the supernova envelope, whereas its asymmetry is explained by the dust formation in the unshocked ejecta. Circumstellar interaction modeling combined with observational data suggests the cirsumstellar shell mass of about 0.14 Msun.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Early-time millimeter observations of the nearby Type II SN 2024ggi

    astro-ph.SR 2024-12 conditional novelty 6.0 of 10

    Deep ALMA non-detections of SN 2024ggi, combined with flash-spectroscopy evidence, favor a pre-explosion eruptive mass-loss rate near 5e-3 solar masses per year over a steady wind.

  2. PISN 2018ibb: radioactive emission of [O III] lines

    astro-ph.HE 2025-01 conditional novelty 5.0 of 10

    A one-zone radioactive heating model with macroscopic nickel-oxygen mixing reproduces the [O III] luminosity of SN 2018ibb and yields a scaling relation for line strength among PISNe.

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