标题： IIb型超新星2024uwq早期冷却观测及前身星限制 显示英文标题

标题： Early Shock-Cooling Observations and Progenitor Constraints of Type IIb SN 2024uwq

摘要： 我们展示了SN 2024uwq这一IIb型超新星的早期多波段测光和光谱观测，捕捉了其激波冷却辐射阶段和双峰光变曲线演化。 早期光谱揭示了宽的 H-α（v ~ 15,500 km s$^{-1}$）和强度相似的He I P-Cygni轮廓。 随着时间推移，He I线的强度增加而H-α减弱，这与氢包层（$M_{env}$ = 0.7 - 1.35 $M_\odot$）覆盖在富氦喷发物上是一致的。 早期激波冷却辐射的解析模型和辐射分析限制了前身星为半剥离恒星，半径R = 10 - 60 $R_\odot$，这与初始ZAMS质量为12 - 20 $M_\odot$的蓝/黄超巨星一致，可能是通过双星相互作用剥离的。 SN 2024uwq处于紧凑型和扩展型IIb超新星之间的过渡位置，突显了双星质量转移效率在塑造剥离包层前身星连续谱中的作用。 我们的结果强调了早期紫外/光学观测的重要性，以表征激波突破信号，这对于绘制大质量恒星演化路径的多样性至关重要。 即将进行的时间域巡天，包括鲁宾天文台的LSST和紫外线任务如ULTRASAT和 UVEX，将革新我们系统性捕获这些早期信号的能力，探测剥离前身星及其爆炸终点的全部多样性。 显示英文摘要

摘要： We present early multi-wavelength photometric and spectroscopic observations of the Type IIb supernova SN 2024uwq, capturing its shock-cooling emission phase and double-peaked light curve evolution. Early spectra reveal broad H-alpha (v ~ 15,500 km s$^{-1}$) and He I P-Cygni profiles of similar strengths. Over time the He I lines increase in strength while the H-alpha decreases, consistent with a hydrogen envelope ($M_{env}$ = 0.7 - 1.35 $M_\odot$ ) overlying helium-rich ejecta. Analytic modeling of early shock cooling emission and bolometric light analysis constrains the progenitor to a partially stripped star with radius R = 10 - 60 $R_\odot$, consistent with a blue/yellow supergiant with an initial ZAMS mass of 12 - 20 $M_\odot$ , likely stripped via binary interaction. SN 2024uwq occupies a transitional position between compact and extended Type IIb supernovae, highlighting the role of binary mass-transfer efficiency in shaping a continuum of stripped-envelope progenitors. Our results underscore the importance of both early UV/optical observations to characterize shock breakout signatures critical to map the diversity in evolutionary pathways of massive stars. Upcoming time domain surveys including Rubin Observatory's LSST and UV missions like ULTRASAT and UVEX will revolutionise our ability to systematically capture these early signatures, probing the full diversity of stripped progenitors and their explosive endpoints.