论文标题
辐射力限制FRB机制
Radiation Forces Constrain the FRB Mechanism
论文作者
论文摘要
我们通过仔细考虑与这些强大瞬变相关的辐射力来对快速无线电爆发（FRB）模型提供约束。我们发现，通过电子/正电子的相干辐射的诱导 - 孔子散射加速到该辐射来源和周围非常大的Lorentz因子（LF）。这严重限制了这些模型的FRB模型，这些模型在距离的距离小于$ 10^{13} $ cm的中子星的相对论冲击和Maser型不稳定性。在这些模型中，辐射在上游行驶，迫使颗粒以比冲击前线大的LF大的LF脱离冲击。这暂停了光子生成的运行少于〜0.1 ms（观察者框架持续时间）。我们表明，大于$ 10^{13} $ cm的距离内的masers无法同时考虑1 ms或更高的爆发持续时间，并且观察到的〜1 GHz的FRB频率无需过多的能量预算（$ 10^{46} $ ERG）；能量不是通过对MASER机制施加任何效率的考虑或其他细节来计算的，而是确保诱发抗击锋上游诱导的compton力加速的结果不会避免Maser过程。为了使源或多或少在几个ms中连续运行，应将其嵌入强磁场中 - 回旋频率$ \ gg $波频率 - 这样，辐射力不会分散等离子体并关闭发动机。
We provide constraints on Fast Radio Burst (FRB) models by careful considerations of radiation forces associated with these powerful transients. We find that the induced-Compton scatterings of the coherent radiation by electrons/positrons accelerate particles to very large Lorentz factors (LF) in and around the source of this radiation. This severely restricts those models for FRBs that invoke relativistic shocks and maser type instabilities at distances less than about $10^{13}$ cm of the neutron star. Radiation traveling upstream, in these models, forces particles to move away from the shock with a LF larger than the LF of the shock front. This suspends the photon generation process after it has been operating for less than ~0.1 ms (observer frame duration). We show that masers operating in shocks at distances larger than $10^{13}$ cm cannot simultaneously account for the burst duration of 1 ms or more and the observed ~1 GHz frequencies of FRBs without requiring an excessive energy budget ($10^{46}$ erg); the energy is not calculated by imposing any efficiency consideration, or other details, for the maser mechanism, but is entirely the result of ensuring that particle acceleration by induced-Compton forces upstream of the shock front does not choke off the maser process. For the source to operate more or less continuously for a few ms, it should be embedded in a strong magnetic field - cyclotron frequency $\gg$ wave frequency - so that radiation forces do not disperse the plasma and shut-off the engine.
