论文标题
IBC型超新星的分子化学和James Webb太空望远镜的诊断潜力
The molecular chemistry of Type Ibc supernovae, and diagnostic potential with the James Webb Space Telescope
论文作者
论文摘要
我们的目的是研究剥离的envelope超新星（SESNE）中的分子化学如何影响物理条件和光谱，并在中红外（MIR）中产生RO振动发射。我们还旨在评估使用JWST观察这种MIR发射的诊断潜力。我们将一个化学动力学网络耦合，包括碳，氧气，硅和含硫分子中的非局部热平衡（NLTE）光谱合成代码SUMO。我们让四个物种-CO，SIO，SIS等参与气体的NLTE冷却，以实现分子形成和温度之间的自洽。我们应用了新框架来对100-600D时间范围内的IC SN型频谱进行建模。预计分子将在整个100-600D间隔中以大量数量（典型的质量$ 10^{ - 3} $ 10^{ - 3} $ 10^{ - 3} $ 10^{ - 3}形成。对温度和光发射的影响取决于氧气区的密度，并且随着时代的变化。例如，根据密度，[O I] 6300，6364特征可以用200到450d的分子淬灭。 miR预测显示在CO，SIO和SIS的基本频带以及CO和SIO泛音中的强劲发射。 IBC SN射流类型具有丰富的化学性质，并且考虑分子的作用对于建模在卵形相中的温度和原子发射很重要。与JWST的Sesne的观察有望提供第一个sis的检测，并提供有关喷射区域质量和密度的信息。组合的光学，近红外和miR观测可以打破脱位，并更完整地了解IBC SNE型的核合成，化学和起源。
We aim to investigate how the molecular chemistry in stripped-envelope supernovae (SESNe) affect physical conditions and optical spectra, and produce ro-vibrational emission in the mid-infrared (MIR). We also aim to assess the diagnostic potential of observations of such MIR emission with JWST. We coupled a chemical kinetic network including carbon, oxygen, silicon, and sulfur-bearing molecules into the nonlocal thermal equilibrium (NLTE) spectral synthesis code SUMO. We let four species - CO, SiO, SiS, and SO - participate in NLTE cooling of the gas to achieve self-consistency between the molecule formation and the temperature. We applied the new framework to model the spectrum of a Type Ic SN in the 100-600d time range. Molecules are predicted to form in SESN ejecta in significant quantities (typical mass $10^{-3}$ $M_\odot$) throughout the 100-600d interval. The impact on the temperature and optical emission depends on the density of the oxygen zones and varies with epoch. For example, the [O I] 6300, 6364 feature can be quenched by molecules from 200 to 450d depending on density. The MIR predictions show strong emission in the fundamental bands of CO, SiO, and SiS, and in the CO and SiO overtones. Type Ibc SN ejecta have a rich chemistry and considering the effect of molecules is important for modeling the temperature and atomic emission in the nebular phase. Observations of SESNe with JWST hold promise to provide the first detections of SiS and SO, and to give information on zone masses and densities of the ejecta. Combined optical, near-infrared, and MIR observations can break degeneracies and achieve a more complete picture of the nucleosynthesis, chemistry, and origin of Type Ibc SNe.
