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Probing the Initial Mass Function in the Early Universe: Direct Measurements in the Boötes I Ultrafaint Dwarf Galaxy with JWST/NIRCam

  • Authors: Keyi Ding, 可怿 丁, Mario Gennaro, Roberto J. Avila, Massimo Ricotti, Rachael L. Beaton, Martha L. Boyer, Thomas M. Brown, Annalisa Calamida, Santi Cassisi, Vedant Chandra, Roger E. Cohen, Matteo Correnti, Denija Crnojević, Kareem El-Badry, Marla Geha, Puragra Guhathakurta, Nitya Kallivayalil, Evan N. Kirby, Kristen. B. W. McQuinn, Alessandro Savino, Cheyanne Shariat, Joshua D. Simon, Daniel R. Weisz

Keyi Ding et al 2026 The Astrophysical Journal 1009 .

  • Provider: AAS Journals

Caption: Figure 9.

Goodness-of-fit measurements for each IMF model. The histogram colors indicate the 68%, 95%, and 99% CIs of ﹩{ \mathcal D }\mathrm{post},k﹩, with the median marked by the orange dashed line. The red solid line denotes the observed value, ﹩{ \mathcal D }\mathrm{post},\mathrm{obs}﹩. The SPL model exhibits a substantially larger degree of inconsistency than the other two models.

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