| Téléchargement | - Voir la version finale : The ASKAP-EMU Early Science Project: 888 MHz radio continuum survey of the Large Magellanic Cloud (PDF, 5.3 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/stab1858 |
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| Auteur | Rechercher : Pennock, Clara MIdentifiant ORCID : https://orcid.org/0000-0003-2164-5337; Rechercher : van Loon, Jacco Th; Rechercher : Filipović, Miroslav D; Rechercher : Andernach, HeinzIdentifiant ORCID : https://orcid.org/0000-0003-4873-1681; Rechercher : Haberl, Frank; Rechercher : Kothes, Roland1; Rechercher : Lenc, EmilIdentifiant ORCID : https://orcid.org/0000-0002-9994-1593; Rechercher : Rudnick, LawrenceIdentifiant ORCID : https://orcid.org/0000-0001-5636-7213; Rechercher : White, Sarah VIdentifiant ORCID : https://orcid.org/0000-0002-2340-8303; Rechercher : Agliozzo, ClaudiaIdentifiant ORCID : https://orcid.org/0000-0003-1749-2542; Rechercher : Antón, Sonia; Rechercher : Bojičić, Ivan; Rechercher : Bomans, Dominik J; Rechercher : Collier, Jordan DIdentifiant ORCID : https://orcid.org/0000-0002-2326-7432; Rechercher : Crawford, Evan JIdentifiant ORCID : https://orcid.org/0000-0001-5197-1091; Rechercher : Hopkins, Andrew M; Rechercher : Jeganathan, Kanapathippillai; Rechercher : Kavanagh, Patrick J; Rechercher : Koribalski, Bärbel SIdentifiant ORCID : https://orcid.org/0000-0003-4351-993X; Rechercher : Leahy, DenisIdentifiant ORCID : https://orcid.org/0000-0002-4814-958X; Rechercher : Maggi, Pierre; Rechercher : Maitra, ChandreyeeIdentifiant ORCID : https://orcid.org/0000-0002-0766-7313; Rechercher : Marvil, Josh; Rechercher : Michałowski, Michał JIdentifiant ORCID : https://orcid.org/0000-0001-9033-4140; Rechercher : Norris, Ray P; Rechercher : Oliveira, Joana MIdentifiant ORCID : https://orcid.org/0000-0002-0861-7094; Rechercher : Payne, Jeffrey L; Rechercher : Sano, Hidetoshi; Rechercher : Sasaki, ManamiIdentifiant ORCID : https://orcid.org/0000-0001-5302-1866; Rechercher : Staveley-Smith, ListerIdentifiant ORCID : https://orcid.org/0000-0002-8057-0294; Rechercher : Vardoulaki, EleniIdentifiant ORCID : https://orcid.org/0000-0002-4437-1773 |
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| Affiliation | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
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| Bailleur de fonds | Rechercher : STFC; Rechercher : National Science Foundation; Rechercher : University of Minnesota; Rechercher : COMPETE; Rechercher : Jet Propulsion Laboratory; Rechercher : California Institute of Technology; Rechercher : National Aeronautics and Space Administration |
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| Format | Texte, Article |
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| Sujet | surveys; planetary nebulae: general; Magellanic Clouds; radio continuum: galaxies; radio continuum: ISM; radio continuum: stars |
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| Résumé | We present an analysis of a new 120 deg² radio continuum image of the Large Magellanic Cloud (LMC) at 888 MHz with a bandwidth of 288 MHz and beam size of 13′′.9 × 12′′.1 from the Australian Square Kilometre Array Pathfinder processed as part of the Evolutionary Map of the Universe survey. The median root mean squared noise is 58 μJy beam⁻¹. We present a catalogue of 54 612 sources, divided over a Gold list (30 866 sources) complete down to 0.5 mJy uniformly across the field, a Silver list (22 080 sources) reaching down to <0.2 mJy, and a Bronze list (1666 sources) of visually inspected sources in areas of high noise and/or near bright complex emission. We discuss detections of planetary nebulae and their radio luminosity function, young stellar objects showing a correlation between radio luminosity and gas temperature, novae and X-ray binaries in the LMC, and active stars in the Galactic foreground that may become a significant population below this flux level. We present examples of diffuse emission in the LMC (H II regions, supernova remnants, bubbles) and distant galaxies showcasing spectacular interaction between jets and intracluster medium. Among 14 333 infrared counterparts of the predominantly background radio source population, we find that star-forming galaxies become more prominent below 3 mJy compared to active galactic nuclei. We combine the new 888 MHz data with archival Australia Telescope Compact Array data at 1.4 GHz to determine spectral indices; the vast majority display synchrotron emission but flatter spectra occur too. We argue that the most extreme spectral index values are due to variability. |
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| Date de publication | 2021-07-02 |
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| Maison d’édition | Royal Astronomical Society
Oxford University Press |
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| Licence | |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 79b840f2-6629-4db1-ad65-ecba9635f600 |
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| Enregistrement créé | 2022-11-04 |
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| Enregistrement modifié | 2022-11-04 |
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