| Téléchargement | - Voir la version finale : Magnetized H i superbubbles in the Small Magellanic Cloud revealed by the POSSUM pilot survey (PDF, 4.3 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/stae2245 |
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| Auteur | Rechercher : Jung, S LylaIdentifiant ORCID : https://orcid.org/0000-0001-5512-3735; Rechercher : Seta, AIdentifiant ORCID : https://orcid.org/0000-0001-9708-0286; Rechercher : Price, J MIdentifiant ORCID : https://orcid.org/0000-0001-7013-0562; Rechercher : McClure-Griffiths, N M; Rechercher : Livingston, J DIdentifiant ORCID : https://orcid.org/0000-0002-4090-8000; Rechercher : Gaensler, B M; Rechercher : Ma, Y KIdentifiant ORCID : https://orcid.org/0000-0003-0742-2006; Rechercher : Tahani, M; Rechercher : Anderson, C S; Rechercher : Federrath, C; Rechercher : Van Eck, C LIdentifiant ORCID : https://orcid.org/0000-0002-7641-9946; Rechercher : Leahy, DIdentifiant ORCID : https://orcid.org/0000-0002-4814-958X; Rechercher : O’Sullivan, S P; Rechercher : West, J1Identifiant ORCID : https://orcid.org/0000-0001-7722-8458; Rechercher : Heald, GIdentifiant ORCID : https://orcid.org/0000-0002-2155-6054; Rechercher : Akahori, TIdentifiant ORCID : https://orcid.org/0000-0001-9399-5331 |
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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 : Australian Government; Rechercher : Government of Western Australia; Rechercher : Science and Industry Endowment Fund; Rechercher : Australian Research Council; Rechercher : Natural Sciences and Engineering Research Council of Canada; Rechercher : Canada Foundation for Innovation; Rechercher : European Research Council; Rechercher : Canada Research Chairs; Rechercher : Kavli Institute for Particle Astrophysics and Cosmology |
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| Format | Texte, Article |
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| Sujet | polarization – techniques; polarimetric – ISM; bubbles – ISM; magnetic fields – Magellanic Clouds |
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| Résumé | Neutral hydrogen (H I) bubbles and shells are common in the interstellar medium (ISM). Studying their properties providesinsight into the characteristics of the local ISM as well as the galaxy in which the bubbles reside. We report the detection of magnetic fields associated with superbubbles in the nearby irregular galaxy, the Small Magellanic Cloud (SMC). Using the Polarisation Sky Survey of the Universe’s Magnetism (POSSUM) pilot survey, we obtain a high-density grid (≈ 25 sources deg⁻²) of Faraday rotation measure (RM) from polarized sources behind the SMC. This provides a sufficiently large number of RM measurements to study the magnetic properties of three of the largest H I shells previously identified in the SMC. The RM profiles as a function of distance from the shell centre show characteristic patterns at angular scales comparable to the shell size. We demonstrate that this can be explained by magnetohydrodynamic simulation models of bubbles expanding in magnetized environments. From the observations, we estimate the line-of-sight magnetic field strength at the edges of the shells is enhanced by ∼ 1μG with respect to their centres. This is an order of magnitude larger than the field strength in the ambient medium (∼ 0.1μG) estimated based on the expansion velocity of the shells. This paper highlights the power of densely mapped RM grids in studying the magnetic properties of galactic substructures beyond the Milky Way. |
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| Date de publication | 2024-09-27 |
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| Maison d’édition | 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 | 986af07f-c042-4d90-8039-01f57cffc1fd |
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| Enregistrement créé | 2025-03-26 |
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| Enregistrement modifié | 2025-03-26 |
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