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The PHANGS–JWST Treasury Survey: Star Formation, Feedback, and Dust Physics at High Angular Resolution in Nearby GalaxieS

Abstract:
Abstract The PHANGS collaboration has been building a reference data set for the multiscale, multiphase study of star formation and the interstellar medium (ISM) in nearby galaxies. With the successful launch and commissioning of JWST, we can now obtain high-resolution infrared imaging to probe the youngest stellar populations and dust emission on the scales of star clusters and molecular clouds (∼5–50 pc). In Cycle 1, PHANGS is conducting an eight-band imaging survey from 2 to 21 μ m of 19 nearby spiral galaxies. Optical integral field spectroscopy, CO(2–1) mapping, and UV-optical imaging for all 19 galaxies have been obtained through large programs with ALMA, VLT-MUSE, and Hubble. PHANGS–JWST enables a full inventory of star formation, accurate measurement of the mass and age of star clusters, identification of the youngest embedded stellar populations, and characterization of the physical state of small dust grains. When combined with Hubble catalogs of ∼10,000 star clusters, MUSE spectroscopic mapping of ∼20,000 H ii regions, and ∼12,000 ALMA-identified molecular clouds, it becomes possible to measure the timescales and efficiencies of the earliest phases of star formation and feedback, build an empirical model of the dependence of small dust grain properties on local ISM conditions, and test our understanding of how dust-reprocessed starlight traces star formation activity, all across a diversity of galactic environments. Here we describe the PHANGS–JWST Treasury survey, present the remarkable imaging obtained in the first few months of science operations, and provide context for the initial results presented in the first series of PHANGS–JWST publications.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.3847/2041-8213/acaaae

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ORCID:
0000-0002-2278-9407
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ORCID:
0000-0002-4378-8534
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ORCID:
0000-0002-2545-1700
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0000-0002-8528-7340
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ORCID:
0000-0002-3933-7677


Publisher:
American Astronomical Society
Journal:
The Astrophysical Journal Letters More from this journal
Volume:
944
Issue:
2
Pages:
L17-L17
Publication date:
2023-02-16
DOI:
EISSN:
2041-8213
ISSN:
2041-8205


Language:
English
Keywords:
Pubs id:
1335176
Local pid:
pubs:1335176
Source identifiers:
W4321116142
Deposit date:
2026-02-19
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