论文标题
阿尔玛0.88毫米对行星质量同伴周围的磁盘调查
ALMA 0.88 mm Survey of Disks around Planetary-mass Companions
论文作者
论文摘要
表征磁盘的物理特性和组成可以为巨型行星和卫星的形成提供重要的见解。我们报告了六个行星质量（10-20 $ m _ {\ rm jup} $）的ALMA 0.88毫米（频段7）连续观测：CT CHA B，1RXS 1609 B，ROXS 12 B，ROXS 12 B，ROXS 42B B，DH TAU B，DH TAU B和FU tau b。在同伴的位置未检测到连续源，低至3 $σ$限制为120-210 $μ$ $ jy。鉴于这些非探测，尚不清楚行星质量同伴周围的磁盘是否确实遵循恒星制度的磁盘通量 - 主机质量趋势。这些伴侣磁盘的微弱无线电亮度可能是由于快速径向漂移和缺乏防尘陷阱的结合而产生的。另外，由于二进制系统中的磁盘由于潮汐相互作用而显着降低了毫米的磁通量，因此这些伴随磁盘可能遵循中等分离二进制恒星的关系。可以通过敏感的连续成像为$ \ Lessim $ 10 $μ$ jy的敏感连续成像进行测试。
Characterizing the physical properties and compositions of circumplanetary disks can provide important insights into the formation of giant planets and satellites. We report ALMA 0.88 mm (Band 7) continuum observations of six planetary-mass (10-20 $M_{\rm Jup}$) companions: CT Cha b, 1RXS 1609 b, ROXs 12 b, ROXs 42B b, DH Tau b, and FU Tau b. No continuum sources are detected at the locations of the companions down to 3$σ$ limits of 120-210 $μ$Jy. Given these non-detections, it is not clear whether disks around planetary-mass companions indeed follow the disk flux-host mass trend in the stellar regime. The faint radio brightness of these companion disks may result from a combination of fast radial drift and a lack of dust traps. Alternatively, as disks in binary systems are known to have significantly lower millimeter fluxes due to tidal interactions, these companion disks may instead follow the relationship of moderate-separation binary stars. This scenario can be tested with sensitive continuum imaging at rms levels of $\lesssim$10 $μ$Jy.
