The ALMaQUEST Survey XI: a strong but non-linear relationship between star formation and dynamical equilibrium pressure
學年 112
學期 1
出版(發表)日期 2023-12-07
作品名稱 The ALMaQUEST Survey XI: a strong but non-linear relationship between star formation and dynamical equilibrium pressure
作品名稱(其他語言)
著者 Sara L. Ellison; Hsi-An Pan; Asa F. L. Bluck; Mark R. Krumholz; Lihwai Lin; Leslie Hunt; Edvige Corbelli; Mallory D. Thorp; Jorge Barrera-Ballesteros; Sebastian F. Sánchez; Jillian M. Scudder; Salvatore Quai
單位
出版者
著錄名稱、卷期、頁數 Monthly Notices of the Royal Astronomical Society 527(4), p.10201-10220
摘要 We present the extended ALMA MaNGA QUEnching and STar formation survey (ALMaQUEST), a combination of the original 46 ALMaQUEST galaxies plus new ALMA observations for a further 20 interacting galaxies. Three well-studied scaling relations are fit to the 19 999 star-forming spaxels in the extended sample, namely the resolved Schmidt–Kennicutt relation, the resolved star-forming main-sequence and the resolved molecular gas main sequence. We additionally investigate the relationship between the dynamical equilibrium pressure (PDE) and star formation rate surface density (ΣSFR), which we refer to as the resolved PDE (rPDE) relation. Contrary to previous studies that have focussed on normal star-forming galaxies and found an approximately linear rPDE relation, the presence of more vigourously star-forming galaxies in the extended ALMaQUEST sample reveals a marked turnover in the relation at high pressures. Although the scatter around the linear fit to the rPDE relation is similar to the other three relations, a random forest analysis, which can extract non-linear dependences, finds that PDEis unambiguously more important than either or Σ⋆ for predicting ΣSFR. We compare the observed rPDE relation to the prediction of the pressure-regulated feedback-modulated (PRFM) model of star formation, finding that galaxies residing on the global SFMS do indeed closely follow the rPDE relation predicted by the PRFM theory. However, galaxies above and below the global SFMS show significant deviations from the model. Galaxies with high SFR are instead consistent with models that include other contributions to turbulence in addition to the local star formation feedback.
關鍵字 Galaxies: evolution;galaxies: interactions;galaxies: ISM;galaxies: starburst;galaxies: star formation
語言 en
ISSN 1365-2966; 0035-8711
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度
國別 GBR
公開徵稿
出版型式 ,電子版,紙本
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