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Observational Properties of a Bright Type lax SN 2018cni and a Faint Type Iax SN 2020kyg

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dc.contributor.author Singh, Mridweeka et.al.
dc.contributor.author Misra, Kuntal
dc.date.accessioned 2024-02-16T10:42:48Z
dc.date.available 2024-02-16T10:42:48Z
dc.date.issued 2023-08
dc.identifier.uri https://doi.org/10.3847/1538-4357/acd559
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/1446
dc.description.abstract We present the optical photometric and spectroscopic analysis of two Type Iax supernovae (SNe), 2018cni and 2020kyg. SN 2018cni is a bright Type Iax SN (MV,peak = −17.81 ± 0.21 mag), whereas SN 2020kyg (MV,peak = −14.52 ± 0.21 mag) is a faint one. We derive 56Ni mass of 0.07 and 0.002 Me and ejecta mass of 0.48 and 0.14 Me for SNe 2018cni and 2020kyg, respectively. A combined study of the bright and faint Type Iax SNe in R/ r-band reveals that the brighter objects tend to have a longer rise time. However, the correlation between the peak luminosity and decline rate shows that bright and faint Type Iax SNe exhibit distinct behavior. Comparison with standard deflagration models suggests that SN 2018cni is consistent with the deflagration of a CO white dwarf, whereas the properties of SN 2020kyg can be better explained by the deflagration of a hybrid CONe white dwarf. The spectral features of both the SNe point to the presence of similar chemical species but with different mass fractions. Our spectral modeling indicates stratification at the outer layers and mixed inner ejecta for both of the SNe. en_US
dc.language.iso en en_US
dc.publisher The Astrophysical Journal en_US
dc.relation.ispartofseries 2027;apj953-93
dc.subject Supernovae en_US
dc.title Observational Properties of a Bright Type lax SN 2018cni and a Faint Type Iax SN 2020kyg en_US
dc.type Article en_US


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