| DOI | Resolve DOI: https://doi.org/10.1093/mnras/stab313 |
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| Author | Search for: Norfolk, Brodie J; Search for: Maddison, Sarah T; Search for: Pinte, ChristopheORCID identifier: https://orcid.org/0000-0001-5907-5179; Search for: Van Der Marel, Nienke1; Search for: Booth, Richard AORCID identifier: https://orcid.org/0000-0002-0364-937X; Search for: Francis, Logan1; Search for: Gonzalez, Jean-FrançoisORCID identifier: https://orcid.org/0000-0001-9423-6062; Search for: Ménard, François; Search for: Wright, Chris M; Search for: Van Der Plas, Gerrit; Search for: Garg, Himanshi |
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| Affiliation | - National Research Council of Canada. Herzberg Astronomy and Astrophysics
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| Funder | Search for: Science and Technology Facilities Council; Search for: Agence Nationale de la Recherche; Search for: Australian Research Council; Search for: Commonwealth Scientific and Industrial Research Organisation |
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| Format | Text, Article |
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| Subject | techniques: interferometric; planet–disc interactions; stars: pre-main sequence |
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| Abstract | 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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| Publication date | 2021-02-09 |
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| Publisher | Oxford University Press
Royal Astronomical Society |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 9002256d-064a-47ae-8ca2-4f7084a5fcf3 |
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| Record created | 2023-01-11 |
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| Record modified | 2023-01-11 |
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