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Two Exciting High-redshift Galaxy Candidates Turn Out to Be Two Exciting Brown Dwarfs

  • Authors: Maruša Bradac, Chris Willott, Yoshihisa Asada, Loïc Albert, Gregor Rihtaršič, Anishya Harshan, Jon Judež, Nicholas S. Martis, Andrea Ferrara, Kevin Hainline, Abdurro'uf, Joseph F. V. Allingham, Volker Bromm, John Chisholm, Dan Coe, Guillaume Desprez, Jose M. Diego, Andreas L. Faisst, Seiji Fujimoto, Lukas J. Furtak, Tiger Yu-Yang Hsiao, Kohei Inayoshi, Anton M. Koekemoer, Vasily Kokorev, Brian C. Lemaux, Paulo A. A. Lopes, Ray A. Lucas, Danilo Marchesini, Vladan Markov, Gaël Noirot, Richard Pan, Scott W. Randall, Johan Richard, Luke Robbins, Ghassan T. E. Sarrouh, Marcin Sawicki, Tim Schrabback, Roberta Tripodi, Eros Vanzella, Rogier A. Windhorst

Maruša Bradac et al 2026 The Astrophysical Journal Letters 1010 .

  • Provider: AAS Journals

Caption: Figure 2.

NIRSpec PRISM spectra of the F356W dropout (Bullet-BD1, 7107472, top) and F277W dropout (Bullet-BD2, 7107197, bottom) with slit placement insets. Also shown are flux uncertainties in gray. We show model fits using the ATMO2020 model (A. M. Meisner et al. 2023) built into NIFTY (K. N. Hainline et al. 2026b) in blue. In yellow, we show best-fit galaxy model fits (at z = 32.2 ± 0.5 and 30.0 ± 0.1) using Bagpipes. Brown dwarf templates fit the data marginally better (χ2/dof = 1.26 versus 1.27 for Bullet-BD1 and χ2/dof = 0.97 versus 1.23 for Bullet-BD2).

(The data used to create this figure are available in the online article.)

(The data used to create this figure are available.)

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