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Bolatto, Alberto D.; Levy, Rebecca C.; Tarantino, Elizabeth; Boyer, Martha L.; Fisher, Deanne B.; Cronin, Serena A.; Leroy, Adam K.; Klessen, Ralf S.; Smith, J. D.; Berg, Danielle A.; Böker, Torsten; Boogaard, Leindert A.; Ostriker, Eve C.; Thompson, Todd A.; Ott, Juergen; Lenkić, Laura; Lopez, Laura A.; Dale, Daniel A.; Veilleux, Sylvain; van der Werf, Paul P.; Glover, Simon C. O.; Sandstrom, Karin M.; Skillman, Evan D.; Chisholm, John; Villanueva, Vicente; Lai, Thomas S.-Y.; Lopez, Sebastian; Mills, Elisabeth A. C.; Emig, Kimberly L.; Armus, Lee; Mayya, Divakara; Meier, David S.; De Looze, Ilse; Herrera-Camus, Rodrigo; Walter, Fabian; Relaño, Mónica; Koziol, Hannah B.; Marvil, Joshua; Jiménez-Donaire, María J.; Martini, Paul
The Astrophysical journal, 05/2024, Letnik: 967, Številka: 1Journal Article
Abstract We present new observations of the central 1 kpc of the M82 starburst obtained with the James Webb Space Telescope near-infrared camera instrument at a resolution θ ∼ 0.″05–0.″1 (∼1–2 pc). The data comprises images in three mostly continuum filters (F140M, F250M, and F360M), and filters that contain Fe ii (F164N), H 2 v = 1 → 0 (F212N), and the 3.3 μ m polycyclic aromatic hydrocarbon (PAH) feature (F335M). We find prominent plumes of PAH emission extending outward from the central starburst region, together with a network of complex filamentary substructures and edge-brightened bubble-like features. The structure of the PAH emission closely resembles that of the ionized gas, as revealed in Paschen α and free–free radio emission. We discuss the origin of the structure, and suggest the PAHs are embedded in a combination of neutral, molecular, and photoionized gas.
