论文标题
活跃的Galaxy MCG-02-04-026中的中红外耀斑：核瞬态事件的尘埃
A Mid-infrared Flare in the Active Galaxy MCG-02-04-026: Dust Echo of a Nuclear Transient Event
论文作者
论文摘要
我们报告了使用附近Seyfert 1.9 Galaxy MCG-02-04-026中心的明智数据发现中红外（MIR）耀斑的发现。 Mir Flare始于2014年上半年，在2015年底左右达到顶峰，并于2017年褪色。在这些年中，Energy在红外线中发布了超过7美元的$ 7 \ TIMES10^{50} $ ERG，而Flare的Mir颜色通常变成红色。我们既没有根据可用数据检测到与Mir耀斑相对应的光学或紫外线（UV）变化。我们使用涉及辐射转移的尘埃回声模型来解释了mir耀斑。 Mir耀斑可以很好地解释为由原发性核瞬态事件的紫外光光子加热的粉尘进行热辐射。尽管由于灰尘的晦涩而没有直接看到瞬态事件，但我们可以推断出它可能产生至少$ \ sim10^{51} $ erg的总能量，其中大部分以不到$ \ sim $ 3年发布。瞬态事件的性质可能是中央超级黑洞（SMBH）的出色潮汐破坏事件，或者突然增强了现有的积聚流到SMBH上，或者是特别明亮的超新星。
We report the discovery of a mid-infrared (MIR) flare using WISE data in the center of the nearby Seyfert 1.9 galaxy MCG-02-04-026. The MIR flare began in the first half of 2014, peaked around the end of 2015, and faded in 2017. During these years, energy more than $7\times10^{50}$ erg was released in the infrared, and the flare's MIR color was generally turning red. We detected neither optical nor ultraviolet (UV) variation corresponding to the MIR flare based on available data. We explained the MIR flare using a dust echo model in which the radiative transfer is involved. The MIR flare can be well explained as thermal reradiation from dust heated by UV-optical photons of a primary nuclear transient event. Although the transient event was not seen directly due to dust obscuration, we can infer that it may produce a total energy of at least $\sim10^{51}$ erg, most of which was released in less than $\sim$3 years. The nature of the transient event could be a stellar tidal disruption event by the central supermassive black hole (SMBH), or a sudden enhancement of the existing accretion flow onto the SMBH, or a supernova which was particularly bright.
