论文标题
核加热速率，热效率和基洛诺瓦建模的不良性的关键作用和参数推断的关键作用
The critical role of nuclear heating rates, thermalization efficiencies and opacities for kilonova modelling and parameter inference
论文作者
论文摘要
我们提出了3D蒙特卡洛辐射转移代码可能的改进版本，以模拟中子星星合并的Kilonovae，其中核加热速率，热化效率和波长依赖性依赖性的不相位取决于射精和时间的局部特性。使用轴对称的两组分流模型，我们探讨了在文献中经常发现的对加热速率，热化效率和不相处的简单化假设如何影响Kilonova光谱和光曲线。具体来说，我们计算五个模型：一个（$ \ texttt {tritucial} $），适当地处理这三个数量，一个（$ \ texttt {simple-heat} $），整个弹药均具有均匀的加热速率，一个（$ \ texttt {simple texttt {simple-therm} $）具有恒定和均匀的灰度 - 灰色extect-以及一个（$ \ texttt {simple-all} $），所有这三个简单的假设都结合在一起。 We find that deviations from the $\texttt{FIDUCIAL}$ model are of several ($\sim1-10$) magnitudes and are generally larger for the $\texttt{SIMPLE-OPAC}$ and $\texttt{SIMPLE-ALL}$ compared to the $\texttt{SIMPLE-THERM}$ and $\texttt{SIMPLE-HEAT}$ models.差异通常从面对面到系统的边缘视图，从早期到晚期，从红外线到紫外线/光学波长。我们的工作表明，Kilonova使用这些简单的假设中的任何一个都应谨慎对待，并且在对喷射参数进行推断时，应将适当的系统不确定性添加到Kilonova光曲线中。
We present an improved version of the 3D Monte Carlo radiative transfer code POSSIS to model kilonovae from neutron star mergers, wherein nuclear heating rates, thermalization efficiencies and wavelength-dependent opacities depend on local properties of the ejecta and time. Using an axially-symmetric two-component ejecta model, we explore how simplistic assumptions on heating rates, thermalization efficiencies and opacities often found in the literature affect kilonova spectra and light curves. Specifically, we compute five models: one ($\texttt{FIDUCIAL}$) with an appropriate treatment of these three quantities, one ($\texttt{SIMPLE-HEAT}$) with uniform heating rates throughout the ejecta, one ($\texttt{SIMPLE-THERM}$) with a constant and uniform thermalization efficiency, one ($\texttt{SIMPLE-OPAC}$) with grey opacities and one ($\texttt{SIMPLE-ALL}$) with all these three simplistic assumptions combined. We find that deviations from the $\texttt{FIDUCIAL}$ model are of several ($\sim1-10$) magnitudes and are generally larger for the $\texttt{SIMPLE-OPAC}$ and $\texttt{SIMPLE-ALL}$ compared to the $\texttt{SIMPLE-THERM}$ and $\texttt{SIMPLE-HEAT}$ models. The discrepancies generally increase from a face-on to an edge-on view of the system, from early to late epochs and from infrared to ultraviolet/optical wavelengths. Our work indicates that kilonova studies using either of these simplistic assumptions ought to be treated with caution and that appropriate systematic uncertainties ought to be added to kilonova light curves when performing inference on ejecta parameters.
