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The impact of H II regions on giant molecular cloud properties in nearby galaxies sampled by PHANGS ALMA and MUSE

Context. The final stages of molecular cloud evolution involve cloud disruption due to feedback by massive stars, with recent literature suggesting the importance of early (i.e., pre-supernova) feedback mechanisms.<i>Aims.<i/> We aim to determine whether feedback from massive stars in H...

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Main Authors: Zakardjian, Antoine (Author) , Pety, Jérôme (Author) , Herrera, Cinthya N. (Author) , Hughes, Annie (Author) , Oakes, Elias (Author) , Kreckel, Kathryn (Author) , Faesi, Christopher (Author) , Glover, Simon (Author) , Groves, Brent (Author) , Klessen, Ralf S. (Author) , Meidt, Sharon E. (Author) , Barnes, Ashley T. (Author) , Belfiore, Francesco (Author) , Bešlić, Ivana (Author) , Bigiel, Frank (Author) , Blanc, Guillermo A. (Author) , Chevance, Mélanie (Author) , Dale, Daniel A. (Author) , Brok, Jakob den (Author) , Eibensteiner, Cosima (Author) , Emsellem, Eric (Author) , García-Rodríguez, Axel (Author) , Grasha, Kathryn (Author) , Koch, Eric W. (Author) , Leroy, Adam K. (Author) , Liu, Daizhong (Author) , Elroy, Rebecca Mc (Author) , Neumann, Lukas (Author) , Pan, Hsi-An (Author) , Querejeta, Miguel (Author) , Razza, Alessandro (Author) , Rosolowsky, Erik (Author) , Saito, Toshiki (Author) , Santoro, Francesco (Author) , Schinnerer, Eva (Author) , Sun, Jiayi (Author) , Usero, Antonio (Author) , Watkins, Elizabeth J. (Author) , Williams, Thomas G. (Author)
Format: Article (Journal)
Language:English
Published: Oct 20 2023
In: Astronomy and astrophysics
Year: 2023, Volume: 678, Pages: 1-31
ISSN:1432-0746
DOI:10.1051/0004-6361/202244520
Online Access:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/202244520
Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2023/10/aa44520-22/aa44520-22.html
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Author Notes:Antoine Zakardjian, Jérôme Pety, Cinthya N. Herrera, Annie Hughes, Elias Oakes, Kathryn Kreckel, Chris Faesi, Simon C. O. Glover, Brent Groves, Ralf S. Klessen, Sharon Meidt, Ashley Barnes, Francesco Belfiore, Ivana Bešlić, Frank Bigiel, Guillermo A. Blanc, Mélanie Chevance, Daniel A. Dale, Jakob den Brok, Cosima Eibensteiner, Eric Emsellem, Axel García-Rodríguez, Kathryn Grasha, Eric W. Koch, Adam K. Leroy, Daizhong Liu, Rebecca Mc Elroy, Lukas Neumann, Hsi-An Pan, Miguel Querejeta, Alessandro Razza, Erik Rosolowsky, Toshiki Saito, Francesco Santoro, Eva Schinnerer, Jiayi Sun, Antonio Usero, Elizabeth J. Watkins, and Thomas Williams
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Summary:Context. The final stages of molecular cloud evolution involve cloud disruption due to feedback by massive stars, with recent literature suggesting the importance of early (i.e., pre-supernova) feedback mechanisms.<i>Aims.<i/> We aim to determine whether feedback from massive stars in H II regions has a measurable impact on the physical properties of molecular clouds at a characteristic scale of ~ 100 pc, and whether the imprint of feedback on the molecular gas depends on the local galactic environment.Methods. We identified giant molecular clouds (GMCs) associated with H II regions for a sample of 19 nearby galaxies from catalogs of GMCs and H II regions released by the PHANGS-ALMA and PHANGS-MUSE surveys, using the overlap of the CO and Hα emission as the key criterion for physical association. We compared the distributions of GMC and H II region properties for paired and non-paired objects. We investigated correlations between GMC and H II region properties among galaxies and across different galactic environments to determine whether GMCs that are associated with H II regions have significantly distinct physical properties compared to the parent GMC population.Results. We identify trends between the H<i>α<i/> luminosity of an H II region and the CO peak brightness and molecular mass of GMCs that we tentatively attribute to a direct physical connection between the matched objects, and which arise independently of the underlying environmental variations of GMC and H II region properties within galaxies. The study of the full sample nevertheless hides a large galaxy-to-galaxy variability.Conclusions. At the ~100 pc scales accessed by the PHANGS-ALMA and PHANGS-MUSE data, pre-supernova feedback mechanisms in H II regions have a subtle but measurable impact on the properties of the surrounding molecular gas, as inferred from CO observations.
Item Description:Gesehen am 16.07.2024
Physical Description:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/202244520

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