| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/stab313 |
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| Auteur | Rechercher : Norfolk, Brodie J; Rechercher : Maddison, Sarah T; Rechercher : Pinte, ChristopheIdentifiant ORCID : https://orcid.org/0000-0001-5907-5179; Rechercher : Van Der Marel, Nienke1; Rechercher : Booth, Richard AIdentifiant ORCID : https://orcid.org/0000-0002-0364-937X; Rechercher : Francis, Logan1; Rechercher : Gonzalez, Jean-FrançoisIdentifiant ORCID : https://orcid.org/0000-0001-9423-6062; Rechercher : Ménard, François; Rechercher : Wright, Chris M; Rechercher : Van Der Plas, Gerrit; Rechercher : Garg, Himanshi |
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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 : Science and Technology Facilities Council; Rechercher : Agence Nationale de la Recherche; Rechercher : Australian Research Council; Rechercher : Commonwealth Scientific and Industrial Research Organisation |
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| Format | Texte, Article |
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| Sujet | techniques: interferometric; planet–disc interactions; stars: pre-main sequence |
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| Résumé | The origin of the inner dust cavities observed in transition discs remains unknown. The segregation of dust and size of the cavity is expected to vary depending on which clearing mechanism dominates grain evolution. We present the results from the Discs Down Under program, an 8.8-mm continuum Australia Telescope Compact Array (ATCA) survey targeting 15 transition discs with large (≳20 au) cavities and compare the resulting dust emission to Atacama Large millimetre/sub-millimetre Array (ALMA) observations. Our ATCA observations resolve the inner cavity for 8 of the 14 detected discs. We fit the visibilities and reconstruct 1D radial brightness models for 10 sources with a S/N > 5σ. We find that, for sources with a resolved cavity in both wavebands, the 8.8 mm and sub-mm brightness distributions peak at the same radius from the star. We suggest that a similar cavity size for 8.8 mm and sub-mm dust grains is due to a dust trap induced by the presence of a companion. |
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| Date de publication | 2021-02-09 |
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| Maison d’édition | Oxford University Press
Royal Astronomical Society |
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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 | 9002256d-064a-47ae-8ca2-4f7084a5fcf3 |
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| Enregistrement créé | 2023-01-11 |
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| Enregistrement modifié | 2023-01-11 |
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