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Gas-Star Formation Cycle in Nearby Galaxies

Published online by Cambridge University Press:  09 June 2023

Hsi-An Pan
Affiliation:
Department of Physics, Tamkang University, No.151, Yingzhuan Road, Tamsui District, New Taipei City 251301, Taiwan email: hapan@gms.tku.edu.tw
Eva Schinnerer
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
Annie Hughes
Affiliation:
CNRS, IRAP, Av. du Colonel Roche BP 44346, F-31028 Toulouse cedex 4, France
Adam Leroy
Affiliation:
Department of Astronomy, The Ohio State University, 140 West 18th Ave, Columbus, OH 43210, USA
Brent Groves
Affiliation:
International Centre for Radio Astronomy Research, The University of Western Australia, Crawley, WA 6009, Australia

Abstract

Star formation, from cold giant molecular clouds to diverse population of stars, is a complex process involving a wide variety of physical processes. In this work, we constrain the link between the gas-star formation cycle and several secular and environmental probe of galaxies. Specifically, we quantify the spatial correlation between molecular gas and star-forming regions for 49 nearby galaxies using the ALMA and narrowband-Hα imaging from the PHANGS survey. At the resolution (150 pc) at which the individual molecular clouds and star-forming regions can be identified, we find that molecular clouds and star-forming regions do not necessarily coexist. The decoupled molecular clouds and star-forming regions are a signature of evolutionary cycling and feedback of the star formation process. Therefore, the impact of galactic-scale conditions and environments must be considered for a complete understanding of how stars form in galaxies and how this process influences the evolution of the host galaxies.

Type
Contributed Paper
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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