Detalles de publicación
PP 024062
PHANGS-HST catalogs for ∼ 100,000 star clusters and compact associations in 38 galaxies: I. Observed properties
(1) Steward Observatory, University of Arizona, (2) Space Telescope Science Institute, (3) Gemini Observatory/NSF’s NOIRLab, (4) Department of Physics and Astronomy, The Johns Hopkins University, (5) Institute of Astronomy, University of Cambridge, (6) Kavli Institute for Cosmology Cambridge, (7) Universit\'e C\ˆote d’Azur, Observatoire de la C\ˆote d’Azur, (8) University of Toledo, (9) Department of Physics and Astronomy, University of Wyoming, (10) Instituto de Astronom\'ıa, Universidad Nacional Aut\'onoma de M\'exico, (11) Department of Astronomy and Astrophysics, University of California, (12) Max-Planck-Institut f\¨ur Astronomie, (13) AURA for the European Space Agency (ESA), Space Telescope Science Institute, (14) Department of Astronomy, The Ohio State University,
(15) Department of Physics, University of Alberta, (16) European Southern Observatory, (17) Univ Lyon, (18) Research School of Astronomy and Astrophysics, Australian National University, (19) ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), (20) International Centre for Radio Astronomy Research, University of Western Australia, (21) University of Virginia Astronomy Department, (22) National Radio Astronomy Observatory, (23) Universit\¨at Heidelberg, Zentrum f\¨ur Astronomie, (24) Universit\¨at Heidelberg, Interdisziplin\¨ares Zentrum f\¨ur Wissenschaftliches Rechnen,
(25) Astronomisches Rechen-Institut, Zentrum f¨ur Astronomie der Universit¨at Heidelberg, (26) Instituto de Astrof\'ısica de Canarias, (27) Departamento de Astrof\'ısica, Universidad de La Laguna, (28) Instituto de Astrof\'ısica de La Plata, CONICET–UNLP, (29) Astronomy Department and Van Vleck Observatory, Wesleyan University, (30) Sub-department of Astrophysics, Department of Physics, University of Oxford.
We present the largest catalog to-date of star clusters and compact associations in nearby galaxies. We have performed a V-band-selected census of clusters across the 38 spiral galaxies of the PHANGS-HST Treasury Survey, and measured integrated, aperture-corrected NUV-U-B-V-I photometry. This work has resulted in uniform catalogs that contain ∼20,000 clusters and compact associations which
have passed human inspection and morphological classification, and a larger sample of ∼100,000 classified by neural network models. Here, we report on the observed properties of these samples, and demonstrate that tremendous insight can be gained from just the observed properties of clusters, even in the absence of their transformation into physical quantities. In particular, we show the utility of the UBVI color-color diagram, and the three principal features revealed by the PHANGS-HST cluster sample: the young cluster locus, the middle-age plume, and the old globular cluster clump. We present an atlas of maps of the 2D spatial distribution of clusters and compact associations in the context of the molecular clouds from PHANGS-ALMA. We explore new ways of understanding this large dataset in a multi-scale context by bringing together once-separate techniques for the characterization of clusters (color-color diagrams and spatial distributions) and their parent galaxies (galaxy morphology and location relative to the galaxy main sequence). A companion paper presents the physical properties: ages, masses, and dust reddenings derived using improved spectral energy distribution (SED) fitting techniques.
have passed human inspection and morphological classification, and a larger sample of ∼100,000 classified by neural network models. Here, we report on the observed properties of these samples, and demonstrate that tremendous insight can be gained from just the observed properties of clusters, even in the absence of their transformation into physical quantities. In particular, we show the utility of the UBVI color-color diagram, and the three principal features revealed by the PHANGS-HST cluster sample: the young cluster locus, the middle-age plume, and the old globular cluster clump. We present an atlas of maps of the 2D spatial distribution of clusters and compact associations in the context of the molecular clouds from PHANGS-ALMA. We explore new ways of understanding this large dataset in a multi-scale context by bringing together once-separate techniques for the characterization of clusters (color-color diagrams and spatial distributions) and their parent galaxies (galaxy morphology and location relative to the galaxy main sequence). A companion paper presents the physical properties: ages, masses, and dust reddenings derived using improved spectral energy distribution (SED) fitting techniques.