The impact of H II regions on giant molecular cloud properties in nearby galaxies sampled by PHANGS ALMA and MUSE
In: ISSN: 0004-6361, 2023
Online
academicJournal
Zugriff:
International audience ; 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. Aims: 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 Hα 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.
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The impact of H II regions on giant molecular cloud properties in nearby galaxies sampled by PHANGS ALMA and MUSE
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Autor/in / Beteiligte Person: | Zakardjian, Antoine ; Pety, Jérôme ; Herrera, Cinthya N. ; Hughes, Annie ; Oakes, Elias ; Kreckel, Kathryn ; Faesi, Chris ; Glover, Simon C. O. ; Groves, Brent ; Klessen, Ralf S. ; Meidt, Sharon ; Barnes, Ashley ; Belfiore, Francesco ; Bešlić, Ivana ; Bigiel, Frank ; Blanc, Guillermo A. ; Chevance, Mélanie ; Dale, Daniel A. ; den Brok, Jakob ; Eibensteiner, Cosima ; Emsellem, Eric ; García-Rodríguez, Axel ; Grasha, Kathryn ; Koch, Eric W. ; Leroy, Adam K. ; Liu, Daizhong ; Mc Elroy, Rebecca ; Neumann, Lukas ; Pan, Hsi-An ; Querejeta, Miguel ; Razza, Alessandro ; Rosolowsky, Erik ; Saito, Toshiki ; Santoro, Francesco ; Schinnerer, Eva ; Sun, Jiayi ; Usero, Antonio ; Watkins, Elizabeth J. ; Williams, Thomas ; Institut de recherche en astrophysique et planétologie (IRAP) ; Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) ; Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) ; Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) ; Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA) ; École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris Sciences et Lettres (PSL)-Université de Cergy Pontoise (UCP) ; Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS) ; Centre de Recherche Astrophysique de Lyon (CRAL) ; École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL) ; Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
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Zeitschrift: | ISSN: 0004-6361, 2023 |
Veröffentlichung: | HAL CCSD ; EDP Sciences, 2023 |
Medientyp: | academicJournal |
DOI: | 10.1051/0004-6361/202244520 |
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