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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 F1.

Corner plots of the posterior distributions for the three IMF models, where the IMF and stellar population parameters are fitted simultaneously. Vertical dashed lines mark the 16th, 50th, and 84th percentiles of the marginal distributions. Comparisons of the marginalized distributions of the IMF parameters are shown in the bottom right panel, with the blue histogram showing the posterior from the baseline fit and the orange histogram from the expanded stellar population fit.

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