论文标题
詹姆斯·韦伯太空望远镜的旧中子星和可检测性的微弱光线
Faint light of old neutron stars and detectability at the James Webb Space Telescope
论文作者
论文摘要
隔离的理想中子星（NS）年龄$> 10^9 $ yrs排气热和旋转能量，并冷却至低于$ \ MATHCAL {O}（100）$ K的温度。这样的NS可以通过动力学和ni灭过程加热粒子暗物质（DM）。在最佳情况下，这将NS表面温度最高为$ \ sim 2550 $ k。最大吸积率取决于DM的环境密度和速度分散率，以及状态及其速度分布的NS方程。扫描这些变量后，我们发现有效的表面温度最大而$ \ sim 40 \％$。这种温暖的NS峰的黑色体光谱在接近红外波长处，其大小在詹姆斯·韦伯太空望远镜（JWST）可能可检测到的范围内。使用JWST曝光时间计算器，我们证明了表面温度的NS $ \ gtrsim 2400 $ k，位于10 \的距离，可以通过nircam仪器的F150W2（F322W2）过滤器检测到PC，在SNR \，$ \ GTRSIM 10 $（5）内24小时内的NIRCAM仪器的过滤器。与DM无关，对具有表面温度的NS的观察$ \ gtrsim 2500 $ K将是测试后期进化阶段最小冷却范式的形成一步。
Isolated ideal neutron stars (NS) of age $>10^9$ yrs exhaust thermal and rotational energies and cool down to temperatures below $\mathcal{O}(100)$ K. Accretion of particle dark matter (DM) by such NS can heat them up through kinetic and annihilation processes. This increases the NS surface temperature to a maximum of $\sim 2550$ K in the best case scenario. The maximum accretion rate depends on the DM ambient density and velocity dispersion, and on the NS equation of state and their velocity distributions. Upon scanning over these variables, we find that the effective surface temperature varies at most by $\sim 40\%$. Black body spectrum of such warm NS peak at near infrared wavelengths with magnitudes in the range potentially detectable by the James Webb Space Telescope (JWST). Using the JWST exposure time calculator, we demonstrate that NS with surface temperatures $\gtrsim 2400$ K, located at a distance of 10\,pc can be detected through the F150W2 (F322W2) filters of the NIRCAM instrument at SNR\,$\gtrsim 10$ (5) within 24 hours of exposure time. Independently of DM, an observation of NS with surface temperatures $\gtrsim 2500$ K will be a formative step towards testing the minimal cooling paradigm during late evolutionary stages.
