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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 8.

Two-dimensional histogram of the observed CMD (top-left panel). The remaining three panels show the corresponding significance maps for each model, as defined in Equation (9). The maps are displayed using a diverging colormap: yellow indicates good agreement, blue regions indicate bins where the observed CMD contains more stars, and red regions indicate bins where the posterior CMD contains more stars.

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