银河系卫星星系搜寻和物理性质研究进展
近十几年来，银河系卫星星系搜寻取得了重要进展。截至 2021 年，已发现卫星星系 60余个，并且该数目随着下一代图像巡天的开展还将继续增加。全面普查卫星星系族群不仅对准确刻画近邻宇宙结构具有重要意义，还能用来检验星系形成模型和暗物质性质。卫星星系作为星系族群的重要组成部分，对其物理性质的研究也是理解星系形成与演化不可或缺的一环。首先介绍了近十几年来卫星星系的搜寻进展，对卫星星系物理性质做了总结，最后展望下一代巡天对该领域带来的机遇。
天文学
银河系矮星系图像巡天
潘治政1,2，杨超1,2，房敏1,2，郑宪忠1,2.银河系卫星星系搜寻和物理性质研究进展[EB/OL].(2023-06-07)[2025-10-30].https://chinaxiv.org/abs/202306.00391.点此复制
Significant advances in the searching of Milky Way satellite galaxies have been achieved in the past two decades, thanks to the large-area imaging surveys such as the SDSS and DES. Up to 2021, more than 60 Milky Way satellite galaxies are discovered, and this number is expected to increase with the advent of the next generation imaging surveys such as WFST and LSST. A complete census of Milky Way satellite galaxies is not only crucial for mapping the structure of the local Universe, but also puts observational constraints on galaxy formation models. Satellite galaxies are important constituents of the whole galaxy population, and the investigation of their physical properties is essential to understand the picture of galaxy formation and evolution. The processes on the searching of Milky Way satellites during the past two decades, the searching methods, and the studies on their physical properties are reviewed. It is now clear that the Milky Way satellite galaxies are mainly composed by old, metal poor stellar populations, and they follow the scalingrelations extrapolated by the massive galaxies toward the low-mass regime. The potentialof up-coming surveys on promoting the development of this domain is also discussed.
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