# Submillimeter emission associated with candidate protoplanets

## TL;DR

This paper reports the discovery of submillimeter emission from a dusty circumplanetary disk around PDS 70 c and identifies a potential dust source near PDS 70 b, providing insights into planet formation environments.

## Contribution

First detection of submillimeter emission associated with a young protoplanet, revealing properties of its circumplanetary disk and identifying a new potential dust source near another planet.

## Key findings

- Detected submillimeter emission from PDS 70 c's circumplanetary disk.
- Identified a new compact continuum source near PDS 70 b.
- Estimated dust mass and disk-to-planet mass ratio for PDS 70 c.

## Abstract

We present the discovery of a spatially unresolved source of sub-millimeter continuum emission ($\lambda=855$ $\mu$m) associated with a young planet, PDS 70 c, recently detected in H$\alpha$ 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 $2\times10^{-3}$ and $4.2 \times 10^{-3}$ Earth masses. 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 $10^{-4}-10^{-5}$. Furthermore, we report the discovery of another compact continuum source located $0.074''\pm0.013''$ South-West 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.