Ib/c型剥离包层超新星光变曲线的周期占比
The fraction of periodic SN Ib/c light curves
AI总结：
本研究通过ZTF数据对34个Ib/c型超新星开展周期性调制搜寻，开发了严谨检测流程，发现SN 2020sgf为候选体，证实约20%的剥离包层超新星存在周期性调制，验证了相关方法学。
AI中文摘要：
近期已在剥离包层超新星SN 2022jli和SN 2022esa中发现周期性光度调制现象，这促使研究人员在更大样本中系统搜寻类似行为，这类调制可能表明超新星爆发起源于双星前体系统。本研究利用兹威基瞬变巡天（Zwicky Transient Facility）的高质量测光数据，对34个Ib/c型超新星样本开展首次周期性调制的系统搜寻；研究开发并应用了一套统计严谨的光变曲线周期性调制检测流程，该流程成功复现了此前报道的SN 2022jli和SN 2022esa的周期性波动，还识别出SN 2020sgf为另一个有前景的周期性候选体。研究采用注入-恢复模拟量化了巡天灵敏度随周期和调制振幅的变化关系，将观测到的探测结果与近期恒星族群合成模型对比后发现，在采用的假设下，预测本征周期占比约20%的模型与观测结果一致。本研究结果表明，具有周期性调制的SN 2022jli类事件可能构成剥离包层超新星的一个重要子群，而非极为罕见的事件，同时也验证了适用于未来大视场瞬变巡天的方法学。
英文摘要：
Periodic luminosity modulations have been recently identified for the stripped-envelope supernovae SN 2022jli and SN 2022esa, motivating a systematic search for a similar behavior in a larger sample. Such modulations may indicate the explosions arise in binary progenitor systems. We perform the first systematic search for periodic modulation in a sample of 34 Type Ib/c supernovae with high quality photometry from the Zwicky Transient Facility. We develop and apply a statistically rigorous pipeline for detecting periodic modulation in light curves. The pipeline successfully recovers the previously reported periodic undulations of SN 2022jli and SN 2022esa, and identifies SN 2020sgf as an additional promising periodic candidate. Injection-recovery simulations are used to quantify the survey sensitivity as a function of period and modulation amplitude. Comparing the observed detections with recent population synthesis models shows that, under the adopted assumptions, models predicting intrinsic periodic fractions of order ~20% are consistent with the observations. Our results suggest that periodically modulated SN 2022jli-like events may represent a significant sub-population of stripped-envelope supernovae rather than being exceptionally rare events, while demonstrating a methodology suitable for future wide-field transient surveys.
