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The Epoch of the GSE Merger: Insights from the Splash and Thick-disk Age Distributions

  • Authors: Sihan Lu, 思汗 鲁, Yang Huang, 样 黄, Qikang Feng, 齐康 冯, Huawei Zhang, 华伟 张

Sihan Lu et al 2026 The Astrophysical Journal Letters 1006 .

  • Provider: AAS Journals

Caption: Figure 3.

Age distribution histograms and their corresponding KDEs for the thick disk (orange) and Splash (blue) populations. The majority of stars in both components have ages older than 10 Gyr, indicating that the present-day thick disk formed at early times. Nevertheless, the Splash population shows a relatively higher fraction at the oldest ages compared to the thick disk.

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