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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.15768 |
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| _version_ | 1866916331922653184 |
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| author | Liu, Jialian Wang, Xiaofeng Andrade, Cristina Duverne, Pierre-Alexandre Zhang, Jujia Li, Liping Wang, Zhenyu Navarete, Felipe Reguitti, Andrea Schuldt, Stefan Cai, Yongzhi Filippenko, Alexei V. Yang, Yi Brink, Thomas G. Zheng, WeiKang Esamdin, Ali Iskandar, Abdusamatjan Bai, Chunhai Liu, Jinzhong Li, Xin Hu, Maokai Li, Gaici Li, Wenxiong Ma, Xiaoran Yan, Shengyu Mo, Jun Adami, Christophe Akl, Dalya Antier, Sarah Broens, Eric Ducoin, Jean-Grégoire Elhosseiny, Eslam Esposito, Thomas M. Freeberg, Michael Gokulass, Priya Hello, Patrice Karpov, Sergey Márquez, Isabel Mašek, Martin Pyshna, Oleksandra Rajabov, Yodgor Saint-Gelais, Denis Serrau, Marc Sokoliuk, Oleksii Takey, Ali Tanasan, Manasanun Turpin, Damien |
| author_facet | Liu, Jialian Wang, Xiaofeng Andrade, Cristina Duverne, Pierre-Alexandre Zhang, Jujia Li, Liping Wang, Zhenyu Navarete, Felipe Reguitti, Andrea Schuldt, Stefan Cai, Yongzhi Filippenko, Alexei V. Yang, Yi Brink, Thomas G. Zheng, WeiKang Esamdin, Ali Iskandar, Abdusamatjan Bai, Chunhai Liu, Jinzhong Li, Xin Hu, Maokai Li, Gaici Li, Wenxiong Ma, Xiaoran Yan, Shengyu Mo, Jun Adami, Christophe Akl, Dalya Antier, Sarah Broens, Eric Ducoin, Jean-Grégoire Elhosseiny, Eslam Esposito, Thomas M. Freeberg, Michael Gokulass, Priya Hello, Patrice Karpov, Sergey Márquez, Isabel Mašek, Martin Pyshna, Oleksandra Rajabov, Yodgor Saint-Gelais, Denis Serrau, Marc Sokoliuk, Oleksii Takey, Ali Tanasan, Manasanun Turpin, Damien |
| contents | We present extensive photometric and spectroscopic observations of the nearby Type Ia supernova (SN) 2023wrk at a distance of about 40 Mpc. The earliest detection of this SN can be traced back to a few hours after the explosion. Within the first few days the light curve shows a bump feature, while the B - V color is blue and remains nearly constant. The overall spectral evolution is similar to that of an SN 1991T/SN 1999aa-like SN Ia, while the C II $\lambda6580$ absorption line appears to be unusually strong in the first spectrum taken at $t \approx -$15.4 days after the maximum light. This carbon feature disappears quickly in subsequent evolution but it reappears at around the time of peak brightness. The complex evolution of the carbon line and the possible detection of Ni III absorption around 4700 Å and 5300 Å in the earliest spectra indicate macroscopic mixing of fuel and ash. The strong carbon lines is likely related to collision of SN ejecta with unbound carbon, consistent with the predictions of pulsational delayed-detonation or carbon-rich circumstellar-matter interaction models. Among those carbon-rich SNe Ia with strong C II $\lambda6580$ absorption at very early times, the line-strength ratio of C II to Si II and the B-V color evolution are found to exhibit large diversity, which may be attributed to different properties of unbound carbon and outward-mixing $^{56}$Ni. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_15768 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Early-Time Observations of SN 2023wrk: A Luminous Type Ia Supernova with Significant Unburned Carbon in the Outer Ejecta Liu, Jialian Wang, Xiaofeng Andrade, Cristina Duverne, Pierre-Alexandre Zhang, Jujia Li, Liping Wang, Zhenyu Navarete, Felipe Reguitti, Andrea Schuldt, Stefan Cai, Yongzhi Filippenko, Alexei V. Yang, Yi Brink, Thomas G. Zheng, WeiKang Esamdin, Ali Iskandar, Abdusamatjan Bai, Chunhai Liu, Jinzhong Li, Xin Hu, Maokai Li, Gaici Li, Wenxiong Ma, Xiaoran Yan, Shengyu Mo, Jun Adami, Christophe Akl, Dalya Antier, Sarah Broens, Eric Ducoin, Jean-Grégoire Elhosseiny, Eslam Esposito, Thomas M. Freeberg, Michael Gokulass, Priya Hello, Patrice Karpov, Sergey Márquez, Isabel Mašek, Martin Pyshna, Oleksandra Rajabov, Yodgor Saint-Gelais, Denis Serrau, Marc Sokoliuk, Oleksii Takey, Ali Tanasan, Manasanun Turpin, Damien Solar and Stellar Astrophysics High Energy Astrophysical Phenomena High Energy Physics - Phenomenology We present extensive photometric and spectroscopic observations of the nearby Type Ia supernova (SN) 2023wrk at a distance of about 40 Mpc. The earliest detection of this SN can be traced back to a few hours after the explosion. Within the first few days the light curve shows a bump feature, while the B - V color is blue and remains nearly constant. The overall spectral evolution is similar to that of an SN 1991T/SN 1999aa-like SN Ia, while the C II $\lambda6580$ absorption line appears to be unusually strong in the first spectrum taken at $t \approx -$15.4 days after the maximum light. This carbon feature disappears quickly in subsequent evolution but it reappears at around the time of peak brightness. The complex evolution of the carbon line and the possible detection of Ni III absorption around 4700 Å and 5300 Å in the earliest spectra indicate macroscopic mixing of fuel and ash. The strong carbon lines is likely related to collision of SN ejecta with unbound carbon, consistent with the predictions of pulsational delayed-detonation or carbon-rich circumstellar-matter interaction models. Among those carbon-rich SNe Ia with strong C II $\lambda6580$ absorption at very early times, the line-strength ratio of C II to Si II and the B-V color evolution are found to exhibit large diversity, which may be attributed to different properties of unbound carbon and outward-mixing $^{56}$Ni. |
| title | Early-Time Observations of SN 2023wrk: A Luminous Type Ia Supernova with Significant Unburned Carbon in the Outer Ejecta |
| topic | Solar and Stellar Astrophysics High Energy Astrophysical Phenomena High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.15768 |