AI 中文总结
该研究通过对UGC 11487的WISE W1-W2相位分辨分析，结合多种诊断与计算方法，揭示了其多区核周尘埃响应，不支持单一自相似MIR响应，支持类似被遮掩TDE的吸积瞬变，能恢复亚秒差距响应尺度。
AI 中文摘要
中红外耀斑在主要光学或紫外耀斑微弱、缺失或强烈衰减时，能直接探测被遮掩的潮汐瓦解事件（TDE）候选体中的尘埃再处理情况。我们对2014年至2024年期间MIR选定的TDE候选体UGC 11487/WTP14adeqka的WISE/NEOWISE W1-W2演化进行了相位分辨分析。通过结合时间、颜色和通量诊断，以及现象学建模、受流体动力学启发的块状尘埃回波计算和宿主的孔径匹配紫外到射电光谱能量分布。长达十年的耀斑显示出延迟且更宽的W2响应、颜色滞后以及从约900K冷却到500 - 600K。正通量质心产生的优选延迟为224±45天，对应0.188±0.038秒差距。有效红外光度峰值约为3×10⁴³尔格/秒，积分红外能量为(2.9 - 3.8)×10⁵¹尔格。强烈不支持单一自相似的MIR响应，优选的紧凑描述是双组分现象学模型。代表性的流体块状计算在结构化的多区尘埃响应场景中再现了经验诊断。宿主是一个中等恒星形成的孤立棒旋盘，没有占主导的持续活跃星系核成分。这些结果支持了由结构化核周尘埃重新处理的类似被遮掩TDE的吸积瞬变，并表明相位分辨的WISE诊断可以在被遮掩的吸积驱动核瞬变中恢复特征性的亚秒差距响应尺度。
英文摘要
Mid-infrared (MIR) flares provide a direct probe of dust reprocessing in obscured tidal disruption event (TDE) candidates when the primary optical or ultraviolet flare is weak, missed, or strongly attenuated. We present a phase-resolved analysis of the WISE/NEOWISE W1-W2 evolution of the MIR-selected TDE candidate UGC 11487/WTP14adeqka over 2014-2024. We combine timing, colour, and flux diagnostics with phenomenological modelling, hydrodynamically motivated clumpy dust-echo calculations, and an aperture-matched ultraviolet-to-radio spectral energy distribution of the host. The decade-long flare shows a delayed and broader W2 response, colour hysteresis, and cooling from approximately 900 K to 500-600 K. Positive-fluence centroids yield a preferred delay of $224 +/- 45$ d, corresponding to $0.188 +/- 0.038$ pc. The effective infrared luminosity peaks at approximately $3 x 10^{43}$ erg s$^{-1}$, and the integrated infrared energy is $(2.9-3.8) x 10^{51}$ erg. A single self-similar MIR response is strongly disfavoured, with Delta BIC = 281.7, while the preferred compact description is a two-component phenomenological model. Representative hydro-clumpy calculations reproduce the empirical diagnostics in a structured, multi-zone dust-response scenario. The host is a moderately star-forming isolated barred disc without a dominant persistent active galactic nucleus component. These results support an obscured TDE-like accretion transient reprocessed by structured circumnuclear dust and show that phase-resolved WISE diagnostics can recover characteristic sub-parsec response scales in obscured accretion-powered nuclear transients.
Comments20 pages, 14 figures, submited to A&A
