PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds - INSU - Institut national des sciences de l'Univers
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2022

PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds

Jordan A. Turner
  • Function : Author
Daniel A. Dale
  • Function : Author
James Lilly
  • Function : Author
Mederic Boquien
  • Function : Author
Sinan Deger
  • Function : Author
Janice C. Lee
  • Function : Author
Bradley C. Whitmore
  • Function : Author
Gagandeep S. Anand
  • Function : Author
Samantha M. Benincasa
  • Function : Author
Frank Bigiel
  • Function : Author
Guillermo A. Blanc
  • Function : Author
Mélanie Chevance
  • Function : Author
Christopher M. Faesi
  • Function : Author
Simon C. O. Glover
  • Function : Author
Kathryn Grasha
  • Function : Author
Ralf S. Klessen
  • Function : Author
Kathryn Kreckel
  • Function : Author
J. M. Diederik Kruijssen
  • Function : Author
Adam K. Leroy
  • Function : Author
Hsi-An Pan
  • Function : Author
Erik Rosolowsky
  • Function : Author
Andreas Schruba
  • Function : Author
Thomas G. Williams
  • Function : Author

Abstract

In the hierarchical view of star formation, giant molecular clouds (GMCs) undergo fragmentation to form small-scale structures made up of stars and star clusters. Here we study the connection between young star clusters and cold gas across a range of extragalactic environments by combining the high resolution (1″) PHANGS-ALMA catalogue of GMCs with the star cluster catalogues from PHANGS-HST. The star clusters are spatially matched with the GMCs across a sample of 11 nearby star-forming galaxies with a range of galactic environments (centres, bars, spiral arms, etc.). We find that after 4 - 6 Myr the star clusters are no longer associated with any gas clouds. Additionally, we measure the autocorrelation of the star clusters and GMCs as well as their cross-correlation to quantify the fractal nature of hierarchical star formation. Young (≤10 Myr) star clusters are more strongly autocorrelated on kpc and smaller spatial scales than the $ \, 10$ Myr stellar populations, indicating that the hierarchical structure dissolves over time.
Fichier principal
Vignette du fichier
stac2559.pdf (2.08 Mo) Télécharger le fichier
Origin Publisher files allowed on an open archive

Dates and versions

insu-03854050 , version 1 (12-04-2023)

Identifiers

Cite

Jordan A. Turner, Daniel A. Dale, James Lilly, Mederic Boquien, Sinan Deger, et al.. PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds. Monthly Notices of the Royal Astronomical Society, 2022, 516, pp.4612-4626. ⟨10.1093/mnras/stac2559⟩. ⟨insu-03854050⟩
41 View
47 Download

Altmetric

Share

More