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Detection of Continuum Submillimeter Emission Associated with Candidate Protoplanets

Abstract : We present the discovery of a spatially unresolved source of submillimeter continuum emission (λ = 855 μm) associated with a young planet, PDS 70 c, recently detected in Hα emission around the 5 Myr old T Tauri star PDS 70. We interpret the emission as originating from a dusty circumplanetary disk with a dust mass between 2 × 10-3 M and 4.2 × 10-3 M . Assuming a standard gas-to-dust ratio of 100, the ratio between the total mass of the circumplanetary disk and the mass of the central planet would be between 10-4 and 10-5. Furthermore, we report the discovery of another compact continuum source located 0.″074 ± 0.″013 southwest of a second known planet in this system, PDS 70 b, that was previously detected in near-infrared images. We speculate that the latter source might trace dust orbiting in proximity of the planet, but more sensitive observations are required to unveil its nature.
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Submitted on : Friday, June 24, 2022 - 1:19:47 PM
Last modification on : Saturday, June 25, 2022 - 9:30:02 AM

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Andrea Isella, Myriam Benisty, Richard Teague, Jaehan Bae, Miriam Keppler, et al.. Detection of Continuum Submillimeter Emission Associated with Candidate Protoplanets. The Astrophysical Journal Letters, 2019, 879, ⟨10.3847/2041-8213/ab2a12⟩. ⟨insu-03703850⟩

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