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JWST Observations of Starbursts: A Young Bubble in NGC 253’s Central Starburst

Authors: Kaitlyn E. Sheriff, Elisabeth A. C. Mills, Xinyu Mai, Utsav Siwakoti, Sara E. Duval, Alberto D. Bolatto, Rebecca C. Levy, Jia Wei Teh, Torsten Böker, Serena A. Cronin, Daniel A. Dale, Keaton Donaghue, Kimberly Emig, Simon C. O. Glover, Rodrigo Herrera-Camus, Ralf S. Klessen, Thomas S.-Y. Lai, Ashley E. Lieber, Laura Lenkić, Sebastian Lopez, David S. Meier, Jüergen Ott, J. D. T. Smith, Yu-Hsuan Teng, Paul P. van der Werf, Sylvain Veilleux, Vicente Villanueva, Rachel Cionitti, Joseph Havens, Maleah Rhem, Nathan Shaw, Kai Smith, Hazel Belfiore Wright, Md Abdullah Al Zaman

Kaitlyn E. Sheriff et al 2026 The Astronomical Journal 172 .

Provider: AAS Journals

Caption: Figure 5.

Top row: forward modeling morphological fit to the [Ar II] moment 0 map. The best-fit model moment 0 map (left), observed [Ar II] moment 0 map (center), and pixel-by-pixel residual map (right) are all flux-normalized. The dashed circle marks the best-fit shell radius r₀, and the cross marks the best-fit center offset. The residual is shown on a scale where red (blue) indicates regions where the observation exceeds (falls below) the model. Bottom row: marginal rms residual profiles for the shell radius r₀ (left), shell thickness Δr (center), and the fill fraction f (right) with the parabolic fit (solid curve), best-fit value (red-dashed vertical line), and 1σ uncertainty range (shaded) indicated on each panel.

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