Detection of Continuum Submillimeter Emission Associated with Candidate Protoplanets
Detection of Continuum Submillimeter Emission Associated with Candidate Protoplanets
复制标题
DOI：
10.3847/2041-8213/ab2a12
复制
发表时间：
2019-06
期刊：
影响因子：
--
通讯作者：
A. Isella;M. Benisty;R. Teague;J. Bae;M. Keppler;S. Facchini;L. P'erez
中科院分区：
文献类型：
--
作者：
A. Isella;M. Benisty;R. Teague;J. Bae;M. Keppler;S. Facchini;L. P'erez
我们发现了一个空间分辨的亚毫米连续辐射源（λ = 855 μm），它与一颗年轻的行星PDS 70 c有关，最近在500万年前的金牛座T星星PDS 70周围的Hα辐射中探测到。我们认为辐射来自于一个尘埃质量在2 × 10−3 M <$3到4.2 × 10−3 M <$3之间的尘埃环行星盘。假设标准的气尘比为100，则行星盘的总质量与中心行星的质量之比将在10−4和10−5之间。此外，我们报告发现了另一个紧凑的连续源，位于该系统中的第二颗已知行星PDS 70 B西南0.“074 ± 0.”013，这是以前在近红外图像中检测到的。我们推测，后一种来源可能是在行星附近轨道上运行的尘埃，但需要更敏感的观测来揭示其性质。
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.