发表机构
KMTNet Collaboration; Chungbuk National University; Korea Astronomy and Space Science Institute; DREAMS Collaboration; Westlake University; Hangzhou 310030, Zhejiang Province, China; OGLE Collaboration; Astronomical Observatory, University of Warsaw; PRIME Collaboration; Massey University; Cerro Tololo Inter-American Observato（KMTNet合作组织; 忠北国立大学; 韩国天文学与空间科学研究所; DREAMS合作组织; 西湖大学; 中国浙江省杭州市310030; OGLE合作组织; 华沙大学天文台; PRIME合作组织; 梅西大学; 塞罗托洛洛美洲际观测站）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究分析微引力透镜事件KMT-2026-BLG-0083，发现一个M矮星周围存在两颗类木行星，质量比分别为5.25×10⁻³和3.04×10⁻³，成为第七个微透镜多行星系统。
AI 中文摘要
我们给出了微引力透镜事件KMT-2026-BLG-0083的分析，该事件由KMTNet、OGLE和PRIME巡天独立探测，并由DREAMS巡天进行监测。合并后的数据提供了光变曲线中两个不同的短时标异常的密集覆盖，这些异常无法用标准的双透镜模型重现。对这两个异常的独立分析表明，每个异常都是由透镜的一颗行星伴星产生的，这促使我们采用三透镜解释。建模产生了由众所周知的内-外简并引起的两对简并解，每对解根据源是否经过远处行星伴星的上方或下方而表现出两个局部解。优选模型表明有两颗巨行星，其质量比分别为$q_2=(5.25\pm 0.08)\times 10^{-3}$和$q_3=(3.04\pm 0.24)\times10^{-3}$，围绕一个共同宿主运行。贝叶斯分析表明，宿主是一颗M矮星，质量为$0.48^{+0.36}_{-0.28}~M_\odot$，拥有两颗巨行星，质量分别为$2.65^{+1.96}_{-1.55}~M_{\rm J}$和$1.54^{+1.14}_{-0.90}~M_{\rm J}$。投影的行星-宿主间距分别为$10.6^{+1.7}_{-2.2}$~au和$1.7^{+0.3}_{-0.3}$~au，内行星位于宿主雪线附近，外行星则处于明显更大的间距。因此，KMT-2026-BLG-0083L成为通过引力微透镜发现的第七个已确认的多行星系统，为亚太阳质量恒星周围存在冷巨行星系统提供了又一个实例。
英文摘要
We present the analysis of the microlensing event KMT-2026-BLG-0083, which was independently detected by the KMTNet, OGLE, and PRIME surveys and also monitored by the DREAMS survey. The combined data provide dense coverage of two distinct short-duration anomalies in the light curve that cannot be reproduced by a standard binary-lens model. Independent analyses of the two anomalies indicate that each is produced by a planetary companion to the lens, motivating a triple-lens interpretation. The modeling yields two pairs of degenerate solutions arising from the well-known inner--outer degeneracy, with each pair exhibiting two local solutions depending on whether the source passes above or below the distant planetary companion. The preferred model indicates two giant planets with mass ratios $q_2=(5.25\pm 0.08)\times 10^{-3}$ and $q_3=(3.04\pm 0.24)\times10^{-3}$ orbiting a common host. Bayesian analysis indicates that the host is an M-dwarf star with a mass of $0.48^{+0.36}_{-0.28}~M_\odot$, hosting two giant planets with masses of $2.65^{+1.96}_{-1.55}~M_{\rm J}$ and $1.54^{+1.14}_{-0.90}~M_{\rm J}$. The projected planet--host separations are $10.6^{+1.7}_{-2.2}$~au and $1.7^{+0.3}_{-0.3}$~au, placing the inner planet near the host's snow line and the outer planet at a substantially larger separation. Thus, KMT-2026-BLG-0083L becomes the seventh confirmed multiple-planet system discovered through gravitational microlensing, providing another example of a cold giant planetary system orbiting a subsolar-mass star.
Comments13 pages, 7 figures
