The Astrophysical Journal Supplement Series (Jan 2024)
The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies
- Hamid Hassani,
- Erik Rosolowsky,
- Eric W. Koch,
- Joseph Postma,
- Joseph Nofech,
- Harrisen Corbould,
- David Thilker,
- Adam K. Leroy,
- Eva Schinnerer,
- Francesco Belfiore,
- Frank Bigiel,
- Médéric Boquien,
- Mélanie Chevance,
- Daniel A. Dale,
- Oleg V. Egorov,
- Eric Emsellem,
- Simon C. O. Glover,
- Kathryn Grasha,
- Brent Groves,
- Kiana Henny,
- Jaeyeon Kim,
- Ralf S. Klessen,
- Kathryn Kreckel,
- J. M. Diederik Kruijssen,
- Janice C. Lee,
- Laura A. Lopez,
- Justus Neumann,
- Hsi-An Pan,
- Karin M. Sandstrom,
- Sumit K. Sarbadhicary,
- Jiayi Sun,
- Thomas G. Williams
Affiliations
- Hamid Hassani
- ORCiD
- Dept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; [email protected]
- Erik Rosolowsky
- ORCiD
- Dept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; [email protected]
- Eric W. Koch
- ORCiD
- Dept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; [email protected]; Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USA
- Joseph Postma
- ORCiD
- Dept. of Physics and Astronomy, University of Calgary , Calgary, AB T2N 1N4, Canada
- Joseph Nofech
- ORCiD
- Dept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; [email protected]
- Harrisen Corbould
- ORCiD
- Dept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; [email protected]
- David Thilker
- ORCiD
- Center for Astrophysical Sciences, The Johns Hopkins University , Baltimore, MD 21218, USA
- Adam K. Leroy
- ORCiD
- Department of Astronomy, The Ohio State University , Columbus, OH 43210, USA
- Eva Schinnerer
- ORCiD
- Max Planck Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, Germany
- Francesco Belfiore
- ORCiD
- INAF—Osservatorio Astrofisico di Arcetri , Largo E. Fermi 5, I-50125, Florence, Italy
- Frank Bigiel
- ORCiD
- Argelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, Germany
- Médéric Boquien
- ORCiD
- Instituto de Alta Investigación, Universidad de Tarapacá , Casilla 7D, Arica, Chile
- Mélanie Chevance
- ORCiD
- Zentrum für Astronomie der Universität Heidelberg, Institut für Theoretische Astrophysik , Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany
- Daniel A. Dale
- ORCiD
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82071 USA
- Oleg V. Egorov
- ORCiD
- Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg , Mönchhofstr. 12-14, D-69120 Heidelberg, Germany
- Eric Emsellem
- ORCiD
- European Southern Observatory , Karl-Schwarzschild-Straße 2, D-85748 Garching, Germany; Univ Lyon , Univ Lyon1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, F-69230 Saint-Genis-Laval France
- Simon C. O. Glover
- ORCiD
- Universität Heidelberg , Zentrum für Astronomie, Institut für Theoretische Astrophysik, Albert-Ueberle-Str. 2, D-69120, Heidelberg, Germany
- Kathryn Grasha
- ORCiD
- Research School of Astronomy and Astrophysics, Australian National University , Canberra, ACT 2611, Australia; ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) , Australia
- Brent Groves
- ORCiD
- International Centre for Radio Astronomy Research, University of Western Australia , 7 Fairway, Crawley, 6009 WA, Australia
- Kiana Henny
- ORCiD
- Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82071 USA
- Jaeyeon Kim
- ORCiD
- Kavli Institute for Particle Astrophysics & Cosmology (KIPAC), Stanford University , CA 94305, USA
- Ralf S. Klessen
- ORCiD
- Universität Heidelberg , Zentrum für Astronomie, Institut für Theoretische Astrophysik, Albert-Ueberle-Str. 2, D-69120, Heidelberg, Germany; Universität Heidelberg , Interdisziplinäres Zentrum für Wissenschaftliches Rechnen, Im Neuenheimer Feld 205, D-69120 Heidelberg, Germany
- Kathryn Kreckel
- ORCiD
- Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg , Mönchhofstraße 12-14, D-69120 Heidelberg, Germany
- J. M. Diederik Kruijssen
- ORCiD
- Technical University of Munich , School of Engineering and Design, Department of Aerospace and Geodesy, Chair of Remote Sensing Technology, Arcisstr. 21, D-80333 Munich, Germany
- Janice C. Lee
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USA; Steward Observatory, University of Arizona , Tucson, AZ 85712, USA
- Laura A. Lopez
- ORCiD
- Department of Astronomy, The Ohio State University , 140 W. 18th Ave., Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 W. Woodruff Ave., Columbus, OH 43210, USA
- Justus Neumann
- ORCiD
- Max-Planck-Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, Germany
- Hsi-An Pan
- ORCiD
- Department of Physics, Tamkang University , No. 151, Yingzhuan Rd., Tamsui District, New Taipei City 251301, Taiwan
- Karin M. Sandstrom
- ORCiD
- Department of Astronomy & Astrophysics, University of California , San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA
- Sumit K. Sarbadhicary
- ORCiD
- Department of Astronomy, The Ohio State University , Columbus, OH 43210, USA; Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 W. Woodruff Ave., Columbus, OH 43210, USA; Department of Physics, The Ohio State University , Columbus, OH 43210, USA
- Jiayi Sun
- ORCiD
- Department of Physics and Astronomy, McMaster University , 1280 Main St. W., Hamilton, ON L8S 4M1, Canada; Canadian Institute for Theoretical Astrophysics (CITA), University of Toronto , 60 St George St., Toronto, ON M5S 3H8, Canada
- Thomas G. Williams
- ORCiD
- Sub-department of Astrophysics, Department of Physics, University of Oxford , Keble Rd., Oxford OX1 3RH, UK
- DOI
- https://doi.org/10.3847/1538-4365/ad152c
- Journal volume & issue
-
Vol. 271,
no. 1
p. 2
Abstract
We present the Physics at High Angular resolution in Nearby GalaxieS (PHANGS)-AstroSat atlas, which contains UV imaging of 31 nearby star-forming galaxies captured by the Ultraviolet Imaging Telescope on the AstroSat satellite. The atlas provides a homogeneous data set of far-UV and near-UV maps of galaxies within a distance of 22 Mpc and a median angular resolution of 1.″4 (corresponding to a physical scale between 25 and 160 pc). After subtracting a uniform UV background and accounting for Milky Way extinction, we compare our estimated flux densities to GALEX observations, finding good agreement. We find candidate extended UV disks around the galaxies NGC 6744 and IC 5332. We present the first statistical measurements of the clumping of the UV emission and compare it to the clumping of molecular gas traced with the Atacama Large Millimeter/submillimeter Array (ALMA). We find that bars and spiral arms exhibit the highest degree of clumping, and the molecular gas is even more clumped than the far-UV (FUV) emission in galaxies. We investigate the variation of the ratio of observed FUV to H α in different galactic environments and kiloparsec-sized apertures. We report that ∼65% of the variation of the log _10 (FUV/H α ) can be described through a combination of dust attenuation with star formation history parameters. The PHANGS-AstroSat atlas enhances the multiwavelength coverage of our sample, offering a detailed perspective on star formation. When integrated with PHANGS data sets from ALMA, the Very Large Telescope-MUSE, the Hubble Space Telescope, and JWST, it develops our comprehensive understanding of attenuation curves and dust attenuation in star-forming galaxies.
Keywords
