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A Two-Component Probability Distribution Function Describes the Mid-IR Emission from the Disks of Star-forming Galaxies

  • Authors: Debosmita Pathak, Adam K. Leroy, Todd A. Thompson, Laura A. Lopez, Francesco Belfiore, Médéric Boquien, Daniel A. Dale, Simon C. O. Glover, Ralf S. Klessen, Eric W. Koch, Erik Rosolowsky, Karin M. Sandstrom, Eva Schinnerer, Rowan Smith, Jiayi Sun, Jessica Sutter, Thomas G. Williams, Frank Bigiel, Yixian Cao, Jérémy Chastenet, Mélanie Chevance, Ryan Chown, Eric Emsellem, Christopher M. Faesi, Kirsten L. Larson, Janice C. Lee, Sharon Meidt, Eve C. Ostriker, Lise Ramambason, Sumit K. Sarbadhicary, David A. Thilker

Debosmita Pathak et al 2024 The Astronomical Journal 167 .

  • Provider: AAS Journals

Caption: Figure 6.

The galactic disk PDFs (in black) of our full sample of 19 galaxies at 7.7, 10, 11.3, and 21 μm show an overall lognormal distribution with a power-law tail at higher intensities. The power law component can be primarily attributed to emission from individual H II regions (blue), and the lognormal component comes from emission from outside H II regions (red). Vertical dashed lines indicate the rms noise level in each filter for reference. The best-fit lognormal mean μ and dispersion σ are included for each PDF.

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