从核心坍缩超新星的千赫兹引力波信号探索标准模型之外的物理学
Exploring Physics beyond the Standard Model from kHz-Gravitational-Wave Signals of Core-Collapse Supernovae
AI总结：
研究从核心坍缩超新星千赫兹引力波信号探索标准模型外物理学，利用多维建模预测高频GW信号，通过分析PNS振荡模式及不同物理过程产生的GW信号，结合下一代探测器探测，提供多信使途径识别新物理特征。
AI中文摘要：
核心坍缩超新星（CCSNe）多维建模的最新进展，使高频引力波（GW）信号的详细预测成为可能，为极端物质和引力提供了新探测手段。原中子星（PNS）通过其特征振荡模式激发发出准连续GWs。当前CCSNe模拟表明，这些振荡，特别是g和f模式，主导GW频谱，随着PNS紧致度在反弹后阶段增加，频率从几百赫兹升至千赫兹范围。因此，若能探测到这些GW频率的时间演化，将提供PNS内部结构和周围爆炸动力学的直接定量示踪。除标准GW发射机制外，完全广义相对论（GR）模拟揭示了与更奇特物理过程相关的额外GW源。高度大质量前身星中，持续质量吸积驱动PNS快速收缩和早期黑洞（BH）形成，产生强烈千赫兹GW发射，当PNS核心被BH视界吞噬时突然停止。同样，强一阶量子色动力学（QCD）相变可引发新生夸克核心的二次坍缩和反弹，产生频率超过~2 kHz的强大、持续毫秒的GW爆发。替代引力理论，如标量-张量框架，预测自发标量化可触发PNS多次坍缩，产生类似高频和宽带GW信号。这些GW信号的联合分析，以及下一代GW探测器对它们的探测，为识别CCSN GW机制和广义相对论标准模型之外新物理的确凿特征提供了一条有前景的多信使途径。
英文摘要：
Recent advances in multidimensional modeling of core-collapse supernovae (CCSNe) have enabled detailed predictions of high-frequency gravitational-wave (GW) signals, offering a new probe of extreme matter and gravity. A proto-neutron star (PNS) emits quasi-continuous GWs through the excitation of its characteristic oscillation modes. State-of-the-art CCSN simulations show that these oscillations, in particular $g$- and $f$-modes, dominate the GW spectrum, with frequencies rising from a few hundred hertz to the kilohertz (kHz) range as the PNS compactness increases in the post-bounce phase. Therefore, the temporal evolution of these GW frequencies, if detected, would provide a direct and quantitative tracer of the PNS internal structure and the surrounding explosive dynamics. In addition to such standard GW emission mechanism, fully general relativistic (GR) simulations have revealed additional GW sources linked to more exotic physical processes. In highly massive progenitors, continuous mass accretion drives rapid PNS contraction and early black-hole (BH) formation, producing strong kHz GW emission that abruptly ceases when the PNS core is swallowed by the BH horizon. Similarly, a strong first-order quantum chromodynamics (QCD) phase transition can induce a secondary collapse and rebound of the nascent quark core, generating powerful, millisecond-duration GW bursts with frequencies exceeding $\sim$2 kHz. Alternative theories of gravity, such as scalar-tensor frameworks, predict spontaneous scalarization that can trigger multiple collapses of the PNS, yielding analogous high-frequency and broadband GW signals. The combined analysis of these GW signals, together with their detection by next-generation GW detectors, offers a promising multi-messenger pathway to identify smoking-gun signatures of new physics beyond the standard model of the CCSN GW mechanism and general relativity.
