发表机构
University of Missouri; Arizona State University（密苏里大学; 亚利桑那州立大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究利用JWST/NIRCam八个历元数据建模龙弧中10个微透镜瞬变事件的光变曲线，以测量放大率演化并打破恒星特征与运动属性的简并。
AI 中文摘要
透镜星系团的极端放大效应使得在宇宙学距离上能够探测到星系团尖点瞬变事件中的高光度恒星。z=0.725 处的龙弧因其微透镜事件的高发生率而成为识别瞬变事件的前沿目标，迄今已探测到超过100个此类事件。事件的高发生率和观测的高节奏使得能够测量不同历元之间的最小流量变化，因此当源接近或远离微尖点时，其放大率的演化可以从光变曲线中测量。在本工作中，我们利用两个JWST/NIRCam中带滤波器在四天内采集的八个历元数据，对龙弧中10个瞬变事件的光变曲线进行了建模。注入的合成观测表明，通过额外的观测，单个瞬变光变曲线能够打破恒星特征与运动属性之间的表观简并。
英文摘要
Extreme magnification by lensing galaxy clusters allows the detection of high-luminosity stars during cluster caustic transient events at cosmological distances. The Dragon Arc at z=0.725 is a frontier target for identifying transient events due to its high frequency of microlensing events, and so far >100 of these events have been detected. The high frequency of events and high cadence of observations allow for the measurement of minimal flux variation between epochs, and therefore the magnification evolution as a source approaches or recedes from a microcaustic can be measured from light curves. In this work, we model the light curves of 10 transient events in the Dragon Arc across eight epochs from two JWST/NIRCam medium-band filters taken over four days. Injected synthetic observations demonstrate that with additional observations, individual transient light curves allow the of apparent degeneracies between stellar characteristics and properties of motion.
Comments17 pages, 11 figures, 4 tables
