The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies
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...
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IOP Publishing
2024-01-01
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| Online Access: | https://doi.org/10.3847/1538-4365/ad152c |
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| author | 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 |
| author_facet | 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 |
| author_sort | Hamid Hassani |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T03:20:22Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 0067-0049 |
| language | English |
| last_indexed | 2024-03-08T03:20:22Z |
| publishDate | 2024-01-01 |
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| series | The Astrophysical Journal Supplement Series |
| spelling | doaj.art-2742ed3838434accbbfe314623a130c32024-02-12T10:14:45ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492024-01-012711210.3847/1538-4365/ad152cThe PHANGS-AstroSat Atlas of Nearby Star-forming GalaxiesHamid Hassani0https://orcid.org/0000-0002-8806-6308Erik Rosolowsky1https://orcid.org/0000-0002-5204-2259Eric W. Koch2https://orcid.org/0000-0001-9605-780XJoseph Postma3https://orcid.org/0000-0002-3025-1412Joseph Nofech4https://orcid.org/0000-0002-9553-953XHarrisen Corbould5https://orcid.org/0009-0007-7949-6633David Thilker6https://orcid.org/0000-0002-8528-7340Adam K. Leroy7https://orcid.org/0000-0002-2545-1700Eva Schinnerer8https://orcid.org/0000-0002-3933-7677Francesco Belfiore9https://orcid.org/0000-0002-2545-5752Frank Bigiel10https://orcid.org/0000-0003-0166-9745Médéric Boquien11https://orcid.org/0000-0003-0946-6176Mélanie Chevance12https://orcid.org/0000-0002-5635-5180Daniel A. Dale13https://orcid.org/0000-0002-5782-9093Oleg V. Egorov14https://orcid.org/0000-0002-4755-118XEric Emsellem15https://orcid.org/0000-0002-6155-7166Simon C. O. Glover16https://orcid.org/0000-0001-6708-1317Kathryn Grasha17https://orcid.org/0000-0002-3247-5321Brent Groves18https://orcid.org/0000-0002-9768-0246Kiana Henny19https://orcid.org/0000-0001-7448-1749Jaeyeon Kim20https://orcid.org/0000-0002-0432-6847Ralf S. Klessen21https://orcid.org/0000-0002-0560-3172Kathryn Kreckel22https://orcid.org/0000-0001-6551-3091J. M. Diederik Kruijssen23https://orcid.org/0000-0002-8804-0212Janice C. Lee24https://orcid.org/0000-0002-2278-9407Laura A. Lopez25https://orcid.org/0000-0002-1790-3148Justus Neumann26https://orcid.org/0000-0002-3289-8914Hsi-An Pan27https://orcid.org/0000-0002-1370-6964Karin M. Sandstrom28https://orcid.org/0000-0002-4378-8534Sumit K. Sarbadhicary29https://orcid.org/0000-0002-4781-7291Jiayi Sun30https://orcid.org/0000-0003-0378-4667Thomas G. Williams31https://orcid.org/0000-0002-0012-2142Dept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; hhassani@ualberta.caDept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; hhassani@ualberta.caDept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; hhassani@ualberta.ca; Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USADept. of Physics and Astronomy, University of Calgary , Calgary, AB T2N 1N4, CanadaDept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; hhassani@ualberta.caDept. of Physics, University of Alberta , 4-183 CCIS, Edmonton, Alberta, T6G 2E1, Canada ; hhassani@ualberta.caCenter for Astrophysical Sciences, The Johns Hopkins University , Baltimore, MD 21218, USADepartment of Astronomy, The Ohio State University , Columbus, OH 43210, USAMax Planck Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, GermanyINAF—Osservatorio Astrofisico di Arcetri , Largo E. Fermi 5, I-50125, Florence, ItalyArgelander-Institut für Astronomie, Universität Bonn , Auf dem Hügel 71, D-53121 Bonn, GermanyInstituto de Alta Investigación, Universidad de Tarapacá , Casilla 7D, Arica, ChileZentrum für Astronomie der Universität Heidelberg, Institut für Theoretische Astrophysik , Albert-Ueberle-Str. 2, D-69120 Heidelberg, GermanyDepartment of Physics & Astronomy, University of Wyoming , Laramie, WY 82071 USAAstronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg , Mönchhofstr. 12-14, D-69120 Heidelberg, GermanyEuropean 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 FranceUniversität Heidelberg , Zentrum für Astronomie, Institut für Theoretische Astrophysik, Albert-Ueberle-Str. 2, D-69120, Heidelberg, GermanyResearch 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) , AustraliaInternational Centre for Radio Astronomy Research, University of Western Australia , 7 Fairway, Crawley, 6009 WA, AustraliaDepartment of Physics & Astronomy, University of Wyoming , Laramie, WY 82071 USAKavli Institute for Particle Astrophysics & Cosmology (KIPAC), Stanford University , CA 94305, USAUniversität 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, GermanyAstronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg , Mönchhofstraße 12-14, D-69120 Heidelberg, GermanyTechnical University of Munich , School of Engineering and Design, Department of Aerospace and Geodesy, Chair of Remote Sensing Technology, Arcisstr. 21, D-80333 Munich, GermanySpace Telescope Science Institute , 3700 San Martin Dr., Baltimore, MD 21218, USA; Steward Observatory, University of Arizona , Tucson, AZ 85712, USADepartment 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, USAMax-Planck-Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, GermanyDepartment of Physics, Tamkang University , No. 151, Yingzhuan Rd., Tamsui District, New Taipei City 251301, TaiwanDepartment of Astronomy & Astrophysics, University of California , San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USADepartment 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, USADepartment 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, CanadaSub-department of Astrophysics, Department of Physics, University of Oxford , Keble Rd., Oxford OX1 3RH, UKWe 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.https://doi.org/10.3847/1538-4365/ad152cMolecular gasInterstellar mediumUltraviolet astronomyStellar astronomy |
| spellingShingle | 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 The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies The Astrophysical Journal Supplement Series Molecular gas Interstellar medium Ultraviolet astronomy Stellar astronomy |
| title | The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies |
| title_full | The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies |
| title_fullStr | The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies |
| title_full_unstemmed | The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies |
| title_short | The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies |
| title_sort | phangs astrosat atlas of nearby star forming galaxies |
| topic | Molecular gas Interstellar medium Ultraviolet astronomy Stellar astronomy |
| url | https://doi.org/10.3847/1538-4365/ad152c |
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