论文标题
哥斯拉，一个怪物潜伏在阳光银河系中
Godzilla, a monster lurks in the Sunburst galaxy
论文作者
论文摘要
我们使用Hybrid方法WSLAP+的改进版本对Galaxy群集PSZ1 G311.65-18.48（Z = 0.443）进行了强透镜效应。我们通过包括临界点的位置来扩展约束的数量，这些位置与镜头星系的经典位置约束结合在一起。我们特别注意先前在巨型阳光弧（Z = 2.37）中发现的瞬态候选源（TR）。我们的镜头模型预测，TR距离临界曲线的弧距离位置的一部分，具有比以前发现的更大的放大因子，但仍然不足以解释观察到的通量和缺乏反图像。讨论了可能的候选对抗图像，以降低解释TR所需的放大倍数，但即使在这种情况下，仍然需要极端放大因子（$μ> 1000美元）。为了解释Galaxy镜头星系的所需放大倍率和形态，需要与矮星系（$ M \ sim 10^8 \，{\ rm m} _ {\ odot} $相媲美，具有与矮星系（$ m \ sim 10^8 \，{\ rm m} _ {\ odot} $相媲美的小质量）的存在。我们讨论了该遗产的存在如何可能用于约束暗物质模型。放大物体的较大明显亮度和未解决的性质意味着极端放大倍数和非常发光和紧凑的来源（$ r <0.3 $ pc）的结合。讨论了可能的候选人，包括围绕中间质量黑洞（IMBH）周围的多重恒星或增生盘。根据光谱信息，我们认为在爆发期间捕获的发光蓝色变量（LBV）是最有可能的候选人。由于该来源的极端放大倍率和亮度，我们将其配音哥斯拉。
We model the strong lensing effect in the galaxy cluster PSZ1 G311.65-18.48 (z=0.443) with an improved version of the hybrid method WSLAP+. We extend the number of constraints by including the position of critical points, which are combined with the classic positional constraints of the lensed galaxies. We pay special attention to a transient candidate source (Tr) previously discovered in the giant Sunburst arc (z=2.37). Our lens model predicts Tr to be within a fraction of an arcsecond from the critical curve, having a larger magnification factor than previously found, but still not large enough to explain the observed flux and lack of counterimages. Possible candidate counterimages are discussed that would lower the magnification required to explain Tr, but extreme magnification factors ($μ>1000$) are still required, even in that case. The presence of a small mass perturber with a mass comparable to a dwarf galaxy ($M\sim 10^8 \,{\rm M}_{\odot}$) near the position of Tr is needed in order to explain the required magnification and morphology of the lensed galaxy. We discuss how the existence of this perturber could potentially be used to constrain models of dark matter. The large apparent brightness and unresolved nature of the magnified object implies a combination of extreme magnification and a very luminous and compact source ($r<0.3$ pc). Possible candidates are discussed, including an hyperluminous star or an accretion disc around an intermediate-mass black hole (IMBH). Based on spectral information, we argue that a luminous blue variable (LBV) star caught during an outburst is the most likely candidate. Owing to the extreme magnification and luminosity of this source we dub it Godzilla.
