论文标题
SN 2020OI的无线电光谱：辐射冷却对推导源特性的影响
The radio spectra of SN 2020oi: Effects of radiative cooling on the deduced source properties
论文作者
论文摘要
同步基源中辐射冷却的观察提供了进一步限制其特性的可能性。康普顿冷却在2020年的早期阶段的无线电光谱中指示。结果表明，与先前的主张相反，观察与相对论电子和磁场之间的平选分析以及在超新星爆炸之前的祖细胞之星的恒定质量损失率一致。这种差异的原因是需要将冷却直接包括在拟合过程中，而不是估计其效果。有人强调，超新星喷射的推断特性对同步体自我吸收频率的时间演变敏感。因此，当对表明冷却和/或不均匀性的模拟光谱进行建模时，应格外小心。此外，注意到，超新星无线电发射区域中相对论电子的能量可能太低了，无法有效，无法有效。
Observations of radiative cooling in a synchrotron source offer a possibility to further constrain its properties. Inverse Compton cooling is indicated in the radio spectra during the early phases of SN\,2020oi. It is shown that contrary to previous claims, observations are consistent with equipartition between relativistic electrons and magnetic field as well as a constant mass-loss rate of the progenitor star prior to the supernova explosion. The reason for this difference is the need to include cooling directly in the fitting procedure rather than estimating its effects afterward. It is emphasized that the inferred properties of the supernova ejecta are sensitive to the time evolution of the synchrotron self-absorption frequency; hence, great care should be taken when modeling spectra for which cooling and/or inhomogeneities are indicated. Furthermore, it is noted that the energies of the relativistic electrons in the radio emission regions in supernovae are likely too low for first-order Fermi acceleration to be effective.
