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| Verfasst von: | Sutter, Jessica [VerfasserIn]  |
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| | Sandstrom, Karin [VerfasserIn] |
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| | Chastenet, Jérémy [VerfasserIn] |
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| | Leroy, Adam K. [VerfasserIn] |
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| | Koch, Eric W. [VerfasserIn] |
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| | Williams, Thomas G. [VerfasserIn] |
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| | Chown, Ryan [VerfasserIn] |
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| | Belfiore, Francesco [VerfasserIn] |
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| | Bigiel, Frank [VerfasserIn] |
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| | Boquien, Médéric [VerfasserIn] |
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| | Cao, Yixian [VerfasserIn] |
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| | Chevance, Mélanie [VerfasserIn] |
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| | Dale, Daniel A. [VerfasserIn] |
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| | Egorov, Oleg [VerfasserIn] |
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| | Glover, Simon [VerfasserIn] |
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| | Groves, Brent [VerfasserIn] |
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| | Klessen, Ralf S. [VerfasserIn] |
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| | Kreckel, Kathryn [VerfasserIn] |
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| | Larson, Kirsten L. [VerfasserIn] |
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| | Oakes, Elias K. [VerfasserIn] |
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| | Pathak, Debosmita [VerfasserIn] |
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| | Ramambason, Lise [VerfasserIn] |
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| | Rosolowsky, Erik [VerfasserIn] |
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| | Watkins, Elizabeth J. [VerfasserIn] |
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| Titel: | The fraction of dust mass in the form of polycyclic aromatic hydrocarbons on 10-50 pc scales in nearby galaxies |
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| Verf.angabe: | Jessica Sutter, Karin Sandstrom, Jérémy Chastenet, Adam K. Leroy, Eric W. Koch, Thomas G. Williams, Ryan Chown, Francesco Belfiore, Frank Bigiel, Médéric Boquien, Yixian Cao, Mélanie Chevance, Daniel A. Dale, Oleg V. Egorov, Simon C. O. Glover, Brent Groves, Ralf S. Klessen, Kathryn Kreckel, Kirsten L. Larson, Elias K. Oakes, Debosmita Pathak, Lise Ramambason, Erik Rosolowsky, and Elizabeth J. Watkins |
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| E-Jahr: | 2024 |
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| Jahr: | 2024 August 20 |
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| Umfang: | 31 S. |
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| Illustrationen: | Illustrationen |
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| Fussnoten: | Gesehen am 03.06.2025 |
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| Titel Quelle: | Enthalten in: The astrophysical journal |
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| Ort Quelle: | London : Institute of Physics Publ., 1995 |
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| Jahr Quelle: | 2024 |
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| Band/Heft Quelle: | 971(2024), 2, Artikel-ID 178, Seite 1-31 |
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| ISSN Quelle: | 1538-4357 |
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| Abstract: | Polycyclic aromatic hydrocarbons (PAHs) are a ubiquitous component of the interstellar medium (ISM) in z ∼ 0 massive, star-forming galaxies and play key roles in ISM energy balance, chemistry, and shielding. Wide field-of-view, high-resolution mid-infrared (MIR) images from JWST provide the ability to map the fraction of dust in the form of PAHs and the properties of these key dust grains at 10-50 pc resolution in galaxies outside the Local Group. We use MIR JWST photometric observations of a sample of 19 nearby galaxies from the Physics at High Angular Resolution in Nearby GalaxieS (PHANGS) survey to investigate the variations of the PAH fraction. By comparison to lower-resolution far-infrared mapping, we show that a combination of the MIRI filters (R PAH = [F770W+F1130W]/F2100W) traces the fraction of dust by mass in the form of PAHs (i.e., the PAH fraction, or q PAH). Mapping R PAH across the 19 PHANGS galaxies, we find that the PAH fraction steeply decreases in H ii regions, revealing the destruction of these small grains in regions of ionized gas. Outside H ii regions, we find R PAH is constant across the PHANGS sample with an average value of 3.43 ± 0.98, which, for an illuminating radiation field of intensity 2-5 times that of the radiation field in the solar neighborhood, corresponds to q PAH values of 3%-6%. |
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| DOI: | doi:10.3847/1538-4357/ad54bd |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
kostenfrei: Volltext: https://doi.org/10.3847/1538-4357/ad54bd |
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| | kostenfrei: Volltext: https://dx.doi.org/10.3847/1538-4357/ad54bd |
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| | DOI: https://doi.org/10.3847/1538-4357/ad54bd |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| K10plus-PPN: | 1927306310 |
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| Verknüpfungen: | → Zeitschrift |
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¬The¬ fraction of dust mass in the form of polycyclic aromatic hydrocarbons on 10-50 pc scales in nearby galaxies / Sutter, Jessica [VerfasserIn]; 2024 August 20 (Online-Ressource)
