The impact of H II regions on giant molecular cloud properties in nearby galaxies sampled by PHANGS ALMA and MUSE
學年 112
學期 1
出版（發表）日期 2023-10-20
作品名稱 The impact of H II regions on giant molecular cloud properties in nearby galaxies sampled by PHANGS ALMA and MUSE
作品名稱（其他語言）
著者 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; Thomas Williams
單位
出版者
著錄名稱、卷期、頁數 Astronomy & Astrophysics 678
摘要 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.
關鍵字 HII regions;ISM: clouds;evolution;galaxies: ISM
語言 en
ISSN 1432-0746; 0004-6361
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 FRA
公開徵稿
出版型式 ,電子版,紙本
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/125145 )