论文标题
伽马射线爆发中的扩散光电
Diffusive photospheres in gamma-ray bursts
论文作者
论文摘要
光电发射可能源自两个质性不同的相对论流出：\在光球半径处流出内部光子的最后一个散射，或向流出边界的辐射扩散。在这项工作中，在几个伽马射线爆发（GRB）的早期余气中的温度和温度的测量以及迅速阶段的总通量用于确定流出的初始半径及其洛伦兹因子。结果表明，在某些情况下，流出量相对较低，洛伦兹因子$γ<10 $，有利于茧的解释，而在其他情况下，洛伦兹因子较大$γ> 10 $，表明热量分量的扩散光电起源，与超级流向流出相关。
Photospheric emission may originate from relativistic outflows in two qualitatively different regimes:\ last scattering of photons inside the outflow at the photospheric radius, or radiative diffusion to the boundary of the outflow. In this work the measurement of temperature and flux of the thermal component in the early afterglows of several gamma-ray bursts (GRBs) along with the total flux in the prompt phase are used to determine initial radii of the outflow as well as its Lorentz factors. Results indicate that in some cases the outflow has relatively low Lorentz factors $Γ<10$, favouring cocoon interpretation, while in other cases Lorentz factors are larger $Γ>10$, indicating diffusive photospheric origin of the thermal component, associated with an ultrarelativistic outflow.
