2019/06/14 by Andrea Isella, Myriam Benisty, Richard Teague +5 · 9 citations
Physics and Astronomy · #Astro and Planetary Science #Astrophysics and Star Formation Studies #Circumstellar disk #Emission spectrum #Mass ratio #Planet #Planetary mass #Protoplanet #Stellar, planetary, and galactic studies #Submillimeter Array #T Tauri star #astro-ph.EP #astro-ph.SR
paper · pdf · doi:10.3847/2041-8213/ab2a12
Accepted for publication on ApJL
arxiv created 2019/06/14 · openalex created_date 2019/06/27 · openalex publication_date 2019/07/10 · arxiv updated 2019/07/17 · openalex updated_date 2026/08/06
Abstract We present the discovery of a spatially unresolved source of submillimeter continuum emission ( λ = 855 μ m) associated with a young planet, PDS 70 c, recently detected in H α 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.