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Bridging between Type IIb and Ib Supernovae: SN IIb 2022crv with a Very Thin Hydrogen Envelope

Show simple item record Gangopadhyay, Anjasha Maeda, Keiichi Singh, Avinash A. J, Nayana Nakaoka, Tatsuya Kawabata, Koji S Taguchi, Kenta Singh, Mridweeka Chandra, Poonam Ryder, Stuart D Dastidar, Raya Yamanaka, Masayuki Kawabata, Miho Alsaberi, Rami Z. E Dukiya, Naveen Singh Teja, Rishabh Ailawadhi, Bhavya Dutta, Anirban Sahu, D. K. Moriya, Takashi J Misra, Kuntal Tanaka, Masaomi Chevalier, Roger Tominaga, Nozomu Uno, Kohki Imazawa, Ryo Hamada, Taisei Hori, Tomoya Isogai, Keisuke 2024-02-01T06:07:01Z 2024-02-01T06:07:01Z 2023-11
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/1390
dc.description.abstract We present optical, near-infrared, and radio observations of supernova (SN) SN IIb 2022crv. We show that it retained a very thin H envelope and transitioned from an SN IIb to an SN Ib; prominent Hα seen in the pre-maximum phase diminishes toward the post-maximum phase, while He I lines show increasing strength. SYNAPPS modeling of the early spectra of SN 2022crv suggests that the absorption feature at 6200 Å is explained by a substantial contribution of Hα together with Si II, as is also supported by the velocity evolution of Hα. The light-curve evolution is consistent with the canonical stripped-envelope SN subclass but among the slowest. The light curve lacks the initial cooling phase and shows a bright main peak (peak MV = −17.82 ± 0.17 mag), mostly driven by radioactive decay of 56Ni. The light-curve analysis suggests a thin outer H envelope (Menv ∼ 0.05 Me) and a compact progenitor (Renv ∼ 3 Re). An interaction powered synchrotron self-absorption model can reproduce the radio light curves with a mean shock velocity of 0.1c. The mass-loss rate is estimated to be in the range of (1.9−2.8) × 10−5 Me yr−1 for an assumed wind velocity of1000 km s−1, which is on the high end in comparison with other compact SNe IIb/Ib. SN 2022crv fills a previously unoccupied parameter space of a very compact progenitor, representing a beautiful continuity between the compact andextended progenitor scenario of SNe IIb/Ib en_US
dc.language.iso en en_US
dc.publisher The Astrophysical Journal en_US
dc.relation.ispartofseries 2044;apj957-100
dc.subject Photometry en_US
dc.subject Spectroscopy en_US
dc.subject Supernovae en_US
dc.subject Type Ib supernovae en_US
dc.subject Radio astronomy en_US
dc.title Bridging between Type IIb and Ib Supernovae: SN IIb 2022crv with a Very Thin Hydrogen Envelope en_US
dc.type Article en_US

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