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Unravelling the asphericities in the explosion and multifaceted circumstellar matter of SN 2023ixf

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dc.contributor.author Singh, Avinash
dc.contributor.author Teja, Rishabh Singh
dc.contributor.author Moriya, Takashi J
dc.contributor.author Maeda, K
dc.contributor.author Kawabata, K. S
dc.contributor.author Tanaka, Masaomi
dc.contributor.author Imazawa, Ryo
dc.contributor.author Nakaoka, Tatsuya
dc.contributor.author Gangopadhyay, Anjasha
dc.contributor.author Yamanaka, Masayuki
dc.contributor.author Swain, Vishwajeet
dc.contributor.author Sahu, D. K
dc.contributor.author Anupama, G. C
dc.contributor.author Kumar, Brajesh
dc.contributor.author Anche, Ramya M
dc.contributor.author Sano, Y
dc.contributor.author Raj, A
dc.contributor.author Agnihotri, V. K
dc.contributor.author Bhalerao, Varun
dc.contributor.author Bisht, D
dc.contributor.author Bisht, Mohit Singh
dc.contributor.author Belwal, Kuldeep
dc.contributor.author Chakrabarti, S. K
dc.contributor.author Fujii, Mitsugu
dc.contributor.author Nagayama, Takahiro
dc.contributor.author Matsumoto, K
dc.contributor.author Hamada, Taisei
dc.contributor.author Kawabata, Miho
dc.contributor.author Kumar, Amit
dc.contributor.author Kumar, Ravi
dc.contributor.author Malkan, Brian K
dc.contributor.author Smith, Paul
dc.contributor.author Sakagam, Yuta
dc.contributor.author Taguchi, Kenta
dc.contributor.author Tominaga, Nozomu
dc.contributor.author Watanabe, Arata
dc.date.accessioned 2024-11-29T05:58:25Z
dc.date.available 2024-11-29T05:58:25Z
dc.date.issued 2024-11-01
dc.identifier.citation The Astrophysical Journal, Vol. 975, No. 1, 132 en_US
dc.identifier.issn 1538-4357
dc.identifier.uri http://hdl.handle.net/2248/8589
dc.description Open Access en_US
dc.description Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI
dc.description.abstract We present a detailed investigation of photometric, spectroscopic, and polarimetric observations of the Type II SN 2023ixf. Earlier studies have provided compelling evidence for a delayed shock breakout from a confined dense circumstellar matter (CSM) enveloping the progenitor star. The temporal evolution of polarization in the SN 2023ixf phase revealed three distinct peaks in polarization evolution at 1.4 days, 6.4 days, and 79.2 days, indicating an asymmetric dense CSM, an aspherical shock front and clumpiness in the low-density extended CSM, and an aspherical inner ejecta/He-core. SN 2023ixf displayed two dominant axes, one along the CSM-outer ejecta and the other along the inner ejecta/He-core, showcasing the independent origin of asymmetry in the early and late evolution. The argument for an aspherical shock front is further strengthened by the presence of a high-velocity broad absorption feature in the blue wing of the Balmer features in addition to the P-Cygni absorption post-16 days. Hydrodynamical light-curve modeling indicated a progenitor mass of 10 M⊙ with a radius of 470 R⊙ and explosion energy of 2 × 1051 erg, along with 0.06 M⊙ of 56 Ni, though these properties are not unique due to modeling degeneracies. The modeling also indicated a two-zone CSM: a confined dense CSM extending up to 5 × 1014 cm with a mass-loss rate of 10−2M⊙ yr−1 and an extended CSM spanning from 5 × 1014 to at least 1016 cm with a mass-loss rate of 10−4M⊙ yr−1, both assuming a wind-velocity of 10 km s−1. The early-nebular phase observations display an axisymmetric line profile of [O i], redward attenuation of the emission of Hα post 125 days, and flattening in the Ks-band, marking the onset of dust formation. en_US
dc.language.iso en en_US
dc.publisher American Astronomical Society en_US
dc.relation.uri https://doi.org/10.3847/1538-4357/ad7955
dc.rights © 2024. The Author(s)
dc.subject Core-collapse supernovae en_US
dc.subject Supernova dynamics en_US
dc.subject Type II supernovae en_US
dc.subject Red supergiant stars en_US
dc.subject Polarimetry en_US
dc.subject Spectropolarimetry en_US
dc.title Unravelling the asphericities in the explosion and multifaceted circumstellar matter of SN 2023ixf en_US
dc.type Article en_US


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