Science News内容：

题目：Provement for DESI BAO and signs of a non-accelerating universe

报告人：崔锴祺（紫台研究生）

Journal club内容：

题目：A million-solar-mass object detected at a cosmological distance using gravitational imaging

摘要：Structure on subgalactic scales provides important tests of galaxy formation models and the nature of dark matter. However, such objects are typically too faint to provide robust mass constraints.  Here an extremely low-mass object is detected by means of its gravitational perturbation to a thin lensed arc observed with milli-arcsecond-resolution very long baseline interferometry. This is the lowest-mass object known to us, by two orders of magnitude, to be detected at a cosmological distance by its gravitational effect.

报告人：王慧慧（紫台研究生）

时间：2025年11月14日星期五12:15

地点：紫台3-302

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