PHANGS–JWST First Results: The Influence of Stellar Clusters on Polycyclic Aromatic Hydrocarbons in Nearby Galaxies

Dale, Daniel A. and Boquien, Médéric and Barnes, Ashley T. and Belfiore, Francesco and Bigiel, Frank and Cao, Yixian and Chandar, Rupali and Chastenet, Jérémy and Chevance, Mélanie and Deger, Sinan and Egorov, Oleg V. and Grasha, Kathryn and Groves, Brent and Hassani, Hamid and Henny, Kiana F. and Klessen, Ralf S. and Kreckel, Kathryn and Kruijssen, J. M. Diederik and Larson, Kirsten L. and Lee, Janice C. and Leroy, Adam K. and Liu, Daizhong and Murphy, Eric J. and Rosolowsky, Erik and Sandstrom, Karin and Schinnerer, Eva and Sutter, Jessica and Thilker, David A. and Watkins, Elizabeth J. and Whitmore, Bradley C. and Williams, Thomas G. (2023) PHANGS–JWST First Results: The Influence of Stellar Clusters on Polycyclic Aromatic Hydrocarbons in Nearby Galaxies. The Astrophysical Journal Letters, 944 (2). L23. ISSN 2041-8205

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Official URL: https://doi.org/10.3847/2041-8213/aca769

Abstract

We present a comparison of theoretical predictions of dust continuum and polycyclic aromatic hydrocarbon (PAH) emission with new JWST observations in three nearby galaxies: NGC 628, NGC 1365, and NGC 7496. Our analysis focuses on a total of 1063 compact stellar clusters and 2654 stellar associations previously characterized by the Hubble Space Telescope in the three galaxies. We find that the distributions and trends in the observed PAH-focused infrared colors generally agree with theoretical expectations, and that the bulk of the observations is more aligned with models of larger, ionized PAHs. These JWST data usher in a new era of probing interstellar dust and studying how the intense radiation fields near stellar clusters and associations play a role in shaping the physical properties of PAHs.

Item Type:	Article
Subjects:	Digital Academic Press > Physics and Astronomy
Depositing User:	Unnamed user with email support@digiacademicpress.org
Date Deposited:	18 Apr 2023 05:52
Last Modified:	03 Oct 2024 03:57
URI:	http://science.researchersasian.com/id/eprint/932

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