SN 2023ehl: A Normal Type Ia Supernova with High-velocity Features
Abstract SN 2023ehl, a normal Type Ia supernova with a typical decline rate, was discovered in the galaxy UGC 11555 and offers valuable insights into the explosion mechanisms of white dwarfs. We present a detailed analysis of SN 2023ehl, including spectroscopic and photometric observations. The supernova exhibits high-velocity features in its ejecta, which are crucial for understanding the physical processes during the explosion. We compared the light curves of SN 2023ehl with other well-observed Type Ia supernovae, finding similarities in their evolution. The line strength ratio R (Si ii ) was calculated to be 0.17 ± 0.04, indicating a higher photospheric temperature compared to other supernovae. The maximum quasi-bolometric luminosity was determined to be 1.52 × 10 43 erg s −1 , and the synthesized 56 Ni mass was estimated at 0.77 ± 0.05 M ⊙ . The photospheric velocity at B -band maximum light was measured as 10,150 ± 240 km s −1 , classifying SN 2023ehl as a normal velocity Type Ia supernova. Our analysis suggests that SN 2023ehl aligns more with both the gravitationally confined detonation, providing a comprehensive view of the diversity and complexity of Type Ia supernovae.
Authors
- Moira Andrews (ORCID: https://orcid.org/0000-0002-1895-6639)
- Rongjun Zhang (ORCID: https://orcid.org/0000-0002-1798-9922)
- Liping Fu (ORCID: https://orcid.org/0000-0002-3624-8572)
- Aravind P. Ravi (ORCID: https://orcid.org/0000-0002-7352-7845)
- Xiaolong Li (ORCID: https://orcid.org/0000-0001-9276-2229)
- Xiaoyu Luo (ORCID: https://orcid.org/0000-0003-0592-3042)
- Yijing Luo
- Estefania Padilla Gonzalez (ORCID: https://orcid.org/0000-0003-0209-9246)
- Yize Dong (ORCID: https://orcid.org/0000-0002-7937-6371)
- Emily Hoang (ORCID: https://orcid.org/0000-0003-2744-4755)
- S. Valenti (ORCID: https://orcid.org/0000-0001-8818-0795)
- Joseph Farah (ORCID: https://orcid.org/0000-0003-4914-5625)
- Lei Hu (ORCID: https://orcid.org/0000-0001-7201-1938)
- Darshana Mehta (ORCID: https://orcid.org/0009-0008-9693-4348)
- Shuguang Zeng (ORCID: https://orcid.org/0000-0002-3216-7476)
- Sai Li (ORCID: https://orcid.org/0009-0009-3246-8728)
- G. Terreran (ORCID: https://orcid.org/0000-0003-0794-5982)
- C. McCully (ORCID: https://orcid.org/0000-0001-5807-7893)
- H. M. Zhang (ORCID: https://orcid.org/0009-0002-1231-6494)
- Nicolas Meza Retamal
- Megan Newsome (ORCID: https://orcid.org/0000-0001-9570-0584)
- Xiangyun Zeng (ORCID: https://orcid.org/0000-0002-8049-202X)
- Ali Esamdin (ORCID: https://orcid.org/0000-0003-1845-4900)
- D. A. Howell (ORCID: https://orcid.org/0000-0003-4253-656X)
- Li Wang (ORCID: https://orcid.org/0000-0002-0370-0008)
- Peng Zhang (ORCID: https://orcid.org/0000-0001-9505-3858)
- Cheng Liu (ORCID: https://orcid.org/0009-0005-4961-6070)
- Shiyu Li (ORCID: https://orcid.org/0000-0002-9618-550X)
- Yao Huang (ORCID: https://orcid.org/0000-0002-6552-6439)
- K. Azalee Bostroem (ORCID: https://orcid.org/0000-0002-4924-444X)
- Sheng Zheng
Institutions
- Las Cumbres Observatory Global Telescope Network (US)
- Adler Planetarium (US)
- University of Arizona (US)
- Johns Hopkins University (US)
- University of California, Santa Barbara (US)
- China Three Gorges University (CN)
- Chinese Academy of Sciences (CN)
- Shanghai Normal University (CN)
- Beijing Planetarium (CN)
- Xinjiang Astronomical Observatory (CN)
- University of California, Davis (US)
Publication Details
- Journal
- The Astrophysical Journal
- Published
- 2025-06-06
- DOI
- https://doi.org/10.3847/1538-4357/adcf1b
- Primary Topic
- Gamma-ray bursts and supernovae
- Type
- article
- Field-Weighted Citation Impact
- 0.00