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JWST Observations of Starbursts: Polycyclic Aromatic Hydrocarbons Closely Trace the Cool Phase of M82’s Galactic Wind

  • Authors: Sebastian Lopez, Colton Ring, Adam K. Leroy, Serena A. Cronin, Alberto D. Bolatto, Laura A. Lopez, Vicente Villanueva, Deanne B. Fisher, Todd A. Thompson, Grant P. Donnelly, Lee Armus, Torsten Böker, Leindert A. Boogaard, Martha L. Boyer, Ryan Chown, Daniel A. Dale, Keaton Donaghue, Kimberly Emig, Simon C. O. Glover, Rodrigo Herrera-Camus, Ralf S. Klessen, Thomas S.-Y. Lai, Laura Lenkić, Rebecca C. Levy, David S. Meier, Elisabeth Mills, Juergen Ott, Evan D. Skillman, J. D. T. Smith, Elizabeth J. Tarantino, Sylvain Veilleux, Fabian Walter, Paul P. van der Werf

Sebastian Lopez et al 2026 The Astrophysical Journal Letters 999 .

  • Provider: AAS Journals

Caption: Figure 2.

Log-stretch images of M82’s multiphase outflow. Top Left: Spitzer 8 μm image from C. W. Engelbracht et al. (2006) reflecting mostly PAH 7.7 μm emission. Top Right: IRAM NOEMA+30 m CO(1–0) emission from N. Krieger et al. (2021) tracing cold molecular gas. Bottom Left: HST Hα map tracing ∼104 K ionized gas from S. Lopez et al. (2025). Bottom Right: Chandra X-ray emission from L. A. Lopez et al. (2020) tracing hot ∼107 K gas. The contours in all panels show the JWST 7.7 μm intensity (50, 75, 90, 95, 99 percentiles) as well as the field of view of the JWST data. The PSF size for each of the images is shown in the top right.

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