AI 中文总结
研究红移z=0.991的耀变体PKS 0346-27，通过分析存档射电数据，利用高分辨率射电成像、亮度分布建模及耀斑检测，获得喷流整体洛伦兹因子Gamma<~10的值，支持强子模型，凸显相关监测对研究耀变体喷流的重要性。
AI 中文摘要
红移z=0.991的耀变体PKS 0346-27是在甚高能伽马射线中探测到的最遥远河外源之一。它在2021年11月经历了一次达到TeV能量的大耀斑。最近对其光谱能量分布的建模表明，与具有更高洛伦兹因子的单区轻子喷流模型相比，具有整体洛伦兹因子Gamma=10的单区质子-同步加速器主导的强子模型更受青睐。在此，我们分析存档射电数据以独立估计喷流的整体洛伦兹因子。我们展示了高分辨率射电成像和亮度分布建模，以及长期射电流量密度监测数据中的耀斑检测，并获得Gamma<~10的值。这为PKS 0346-27喷流提出的强子模型提供了支持。我们的结果强调了长期甚长基线干涉测量和总流量密度监测在研究耀变体喷流中的重要性。
英文摘要
The blazar PKS 0346-27 at redshift z=0.991 is among the most distant extragalactic sources detected in very high energy gamma-rays. It underwent a major flare reaching TeV energies in November 2021. Recent modelling of its spectral energy distribution favoured a single-zone proton--synchrotron-dominated hadronic model with bulk Lorentz factor Gamma=10 over a single-zone leptonic jet model with much higher Gamma. Here we analyse archival radio data to give independent estimates of the jet bulk Lorentz factor. We present high-resolution radio imaging and brightness distribution modelling, as well as flare detection in long-term radio flux density monitoring data, and obtain Gamma<~10 values. This lends support to the hadronic model proposed for the PKS 0346-27 jet. Our results highlight the importance of long-term, very long baseline interferometry and total flux density monitoring in studying blazar jets.
Comments19 pages, 4 figures, accepted for publication in the journal Astronomy
Journal refAstronomy, Vol. 5, No. 3, id. 12 (2026)
