We present the discovery of a spatially unresolved source of submillimeter continuum emission (lambda = 855 mu m) associated with a young planet, PDS 70 c, recently detected in Ha 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 x 10(-3) M-circle plus and 4.2 x 10(-3) M-circle plus. 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.

Detection of Continuum Submillimeter Emission Associated with Candidate Protoplanets / A. Isella, M. Benisty, R. Teague, J. Bae, M. Keppler, S. Facchini, L. Pérez. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 879:2(2019), pp. L25.1-L25.10. [10.3847/2041-8213/ab2a12]

Detection of Continuum Submillimeter Emission Associated with Candidate Protoplanets

S. Facchini;
2019

Abstract

We present the discovery of a spatially unresolved source of submillimeter continuum emission (lambda = 855 mu m) associated with a young planet, PDS 70 c, recently detected in Ha 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 x 10(-3) M-circle plus and 4.2 x 10(-3) M-circle plus. 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.
instrumentation: high angular resolution; instrumentation: interferometers; planetary systems; planet-disk interactions; planets and satellites: formation; protoplanetary disks
Settore FIS/05 - Astronomia e Astrofisica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/869736
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