论文标题
在时间依赖性流出中的辐射扩散：快速蓝色光学瞬变的模型
Radiative diffusion in a time-dependent outflow: a model for fast blue optical transients
论文作者
论文摘要
快速蓝色光学瞬变（FBOT）是发光的瞬态，具有快速发展（通常$ t _ {\ rm Rise} <12 \ \ rm天$）$曲线和蓝色（通常是$ \ rm {-0.2 \> \> \ g-r \ f \> \> \> \> \ -0.3} $），无法通过超级andova like like explosion解释。我们提出了在时间依赖的流出模型中的辐射扩散，以解释这种特殊的瞬变。在此模型中，我们假设中央发动机在几天内弹出连续流出。我们认为流出的弹出是时间依赖的。流出最初是光学厚的，并且光子在其中被冷冻。随着流出随着时间的推移的扩展，光子逐渐逃脱，我们的工作是建模这种演变。分别考虑数值和分析计算，结果是一致的。我们将模型应用于三个典型的FBOT：PS1-10BJP，ZTF18ABUKAVN和ATLAS19DQR。该建模找到了流出的总质量（$ \ sim 1-5 {m _ {\ odot}} $），并为他们提供了弹出的总时间（几天$ \ sim $），导致我们推测它们可能是大型星星崩溃的结果。
Fast Blue Optical Transients (FBOTs) are luminous transients with fast evolving (typically $t_{\rm rise}<12\ \rm days$) light curve and blue color (usually $\rm {-0.2\ >\ g-r\ >\ -0.3}$) that cannot be explained by a supernova-like explosion. We propose a radiative diffusion in a time-dependent outflow model to interpret such special transients. In this model, we assume a central engine ejects continuous outflow during a few days. We consider the ejection of the outflow to be time-dependent. The outflow is optically thick initially and photons are frozen in it. As the outflow expands over time, photons gradually escape, and our work is to model such an evolution. Numerical and analytical calculations are considered separately, and the results are consistent. We apply the model to three typical FBOTs: PS1-10bjp, ZTF18abukavn, and ATLAS19dqr. The modeling finds the total mass of the outflow ($\sim 1-5 {M_{\odot}}$), and the total time of the ejection ($\sim$ a few days) for them, leading us to speculate that they may be the result of the collapse of massive stars.
