WFST Supernovae in the First Year: I. Statistical Study of 16 Early-phase Type Ia Supernovae from the Pilot Survey
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| Format: | Preprint |
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2026
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| author | Wu, Weiyu Jiang, Ji-an Xu, Zelin Meng, Dezheng Maeda, Keiichi Kuncarayakti, Hanindyo Galbany, Lluís Jha, Saurabh W. Ivezić, Željko Yoachim, Peter Liu, Zhengyan Zhao, Junhan Wang, Tinggui Kong, Xu Connolly, Andrew J. Jia, Ziqing Hu, Lei Fan, Lulu Jiang, Ning Li, Feng Liang, Ming Tang, Jinlong Wan, Zhen Wang, Hairen Wang, Jian Xue, Yongquan Zhang, Hongfei Zhao, Wen Zheng, Xianzhong Zhu, Qingfeng |
| author_facet | Wu, Weiyu Jiang, Ji-an Xu, Zelin Meng, Dezheng Maeda, Keiichi Kuncarayakti, Hanindyo Galbany, Lluís Jha, Saurabh W. Ivezić, Željko Yoachim, Peter Liu, Zhengyan Zhao, Junhan Wang, Tinggui Kong, Xu Connolly, Andrew J. Jia, Ziqing Hu, Lei Fan, Lulu Jiang, Ning Li, Feng Liang, Ming Tang, Jinlong Wan, Zhen Wang, Hairen Wang, Jian Xue, Yongquan Zhang, Hongfei Zhao, Wen Zheng, Xianzhong Zhu, Qingfeng |
| contents | In this paper we present 16 early-phase type Ia supernovae (SNe Ia) discovered during the pilot survey of the 2.5-meter Wide Field Survey Telescope (WFST-PS) from March 4 to July 10, 2024, including three SNe Ia with early-excess emission features (EExSNe Ia). The discovery magnitude of the 16 WFST-PS early-phase SNe is at least 3 mag fainter than their peak brightness. A large scatter of color indices is found in approximately the first 10 days of supernova explosions, indicating diverse photometric behaviors in the early phase. Three EExSNe Ia show relatively brighter peak luminosities and longer rise time compared to those of non-EExSNe Ia. The results indicate that current theoretical models require further refinement to fully capture the early photometric evolution of SNe Ia. Based on the initial high-cadence ugr-band data from the WFST-PS survey, we emphasize that early near-ultraviolet (NUV) observations are indispensable for placing tight constraints on the explosion mechanisms and progenitor systems of SNe Ia. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_17268 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | WFST Supernovae in the First Year: I. Statistical Study of 16 Early-phase Type Ia Supernovae from the Pilot Survey Wu, Weiyu Jiang, Ji-an Xu, Zelin Meng, Dezheng Maeda, Keiichi Kuncarayakti, Hanindyo Galbany, Lluís Jha, Saurabh W. Ivezić, Željko Yoachim, Peter Liu, Zhengyan Zhao, Junhan Wang, Tinggui Kong, Xu Connolly, Andrew J. Jia, Ziqing Hu, Lei Fan, Lulu Jiang, Ning Li, Feng Liang, Ming Tang, Jinlong Wan, Zhen Wang, Hairen Wang, Jian Xue, Yongquan Zhang, Hongfei Zhao, Wen Zheng, Xianzhong Zhu, Qingfeng High Energy Astrophysical Phenomena Solar and Stellar Astrophysics In this paper we present 16 early-phase type Ia supernovae (SNe Ia) discovered during the pilot survey of the 2.5-meter Wide Field Survey Telescope (WFST-PS) from March 4 to July 10, 2024, including three SNe Ia with early-excess emission features (EExSNe Ia). The discovery magnitude of the 16 WFST-PS early-phase SNe is at least 3 mag fainter than their peak brightness. A large scatter of color indices is found in approximately the first 10 days of supernova explosions, indicating diverse photometric behaviors in the early phase. Three EExSNe Ia show relatively brighter peak luminosities and longer rise time compared to those of non-EExSNe Ia. The results indicate that current theoretical models require further refinement to fully capture the early photometric evolution of SNe Ia. Based on the initial high-cadence ugr-band data from the WFST-PS survey, we emphasize that early near-ultraviolet (NUV) observations are indispensable for placing tight constraints on the explosion mechanisms and progenitor systems of SNe Ia. |
| title | WFST Supernovae in the First Year: I. Statistical Study of 16 Early-phase Type Ia Supernovae from the Pilot Survey |
| topic | High Energy Astrophysical Phenomena Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2602.17268 |