标题： 从激波膨胀伴星的吸积：具有周期调制的双峰超新星光曲线 显示英文标题

标题： Accretion from a shock-inflated companion: double-peaked supernova lightcurve with periodic modulations

摘要： 我们研究了新诞生的中子星与伴星之间的相互作用所产生的观测特征，这些伴星受到超新星抛射物的影响。 我们关注的是爆炸后轨道为束缚态的情况，在这种情况下，中子星可能会周期性地引力捕获伴星的气体。 我们发现，如果超新星爆发前的双星分离距离小于约20个太阳半径，中子星吸积必须发生。 这是因为恒星半径在激波膨胀的包层经历开尔文-赫姆霍兹收缩回到主序星之前会超过这个半径。 随后，我们考虑了相邻盘风事件之间形成的内部激波。 这些激波有效地将盘风的动能转化为辐射（由于逆康普顿冷却），这加热了位于更大半径处的超新星抛射物。 额外的加热产生了明亮的光学辐射，该辐射在轨道时间尺度上周期性调制。 这些激波还加速了非热粒子，这些粒子通过硬核质子-质子碰撞在100 MeV到10 PeV范围内产生伽马射线和中微子辐射。 高能光子在几个月到一年的延迟后从超新星抛射物中泄漏出来。 盘风最慢部分的光致电离产生了氢重组线。 然后，我们利用该模型来解释令人困惑的Ic型超新星SN2022jli，它表现出双峰光学光变曲线以及许多特殊特性，包括第二峰值的延迟开始和快速关闭、周期性调制、延迟的GeV辐射和窄巴尔末线。 根据该模型，SN2022jli在超新星爆发前具有一个近距离的伴星，双星分离距离为10到20个太阳半径，可能是由于早期的共包层演化阶段所致。 显示英文摘要

摘要： We study the observational signatures from the interactions between a newly born neutron star and a companion star that is impacted by the supernova ejecta. We focus on the cases with bound post-explosion orbits, where the neutron star may periodically gravitationally capture gas from the companion. We find that neutron star accretion must occur if the pre-supernova binary separation is less than about 20 Rsun. This is because the stellar radius expands beyond this radius before the shock-inflated envelope undergoes Kelvin-Helmholtz contraction back to the main sequence. We then consider the internal shocks formed between adjacent episodes of disk wind. The shocks efficiently convert the wind kinetic energy into radiation (due to inverse-Compton cooling), which heats up the supernova ejecta located at much larger radii. The extra heating powers bright optical emission that is periodically modulated on the orbital timescale. The shocks also accelerate non-thermal particles which produce gamma-ray and neutrino emission from 100 MeV to 10 PeV via hardronic pp collisions. The high-energy photons leak out of the supernova ejecta after a delay of several months to one year. Photo-ionization of the slowest parts of the disk wind produces hydrogen recombination lines. We then use the model to explain the puzzling Type Ic supernova SN2022jli which shows a double-peaked optical lightcurve along with many peculiar properties, including delayed onset and rapid shutoff of the second peak, periodic modulations, delayed GeV emission, and narrow Balmer lines. Under this model, SN2022jli had a close-by companion at a pre-supernova binary separation of 10 to 20 Rsun, likely due to an earlier phase of common-envelope evolution.