A DWARF TRANSITIONAL PROTOPLANETARY DISK AROUND XZ TAU B

作者：Osorio Mayra^*; Macias Enrique; Anglada Guillem; Carrasco Gonzalez Carlos; Galvan Madrid Roberto; Zapata Luis; Calvet Nuria; Gomez Jose F; Nagel Erick; Rodriguez Luis F; Torrelles Jose M; Zhu Zhaohuan

来源：Astrophysical Journal Letters, 2016, 825(1): L10.

DOI：10.3847/2041-8205/825/1/L10

• planet-disk interactions
• protoplanetary disks
• stars: formation
• stars: individual (XZ Tau B)
• stars: pre-main sequence

We report the discovery of a dwarf protoplanetary disk around the star XZ Tau B that shows all the features of a classical transitional disk but on a much smaller scale. The disk has been imaged with the Atacama Large Millimeter/submillimeter Array (ALMA), revealing that its dust emission has a quite small radius of similar to 3.4 au and presents a central cavity of similar to 1.3 au in radius that we attribute to clearing by a compact system of orbiting (proto) planets. Given the very small radii involved, evolution is expected to be much faster in this disk (observable changes in a few months) than in classical disks (observable changes requiring decades) and easy to monitor with observations in the near future. From our modeling we estimate that the mass of the disk is large enough to form a compact planetary system.

• 出版日期2016-7-1