11:30 AM - 11:45 AM
[PCG19-04] Mutual Relation among the Circummultiple Structure, the Circumstellar Disk, and the Outflow: the Young Multiple IRAS 16293-2422 Source A Case
Keywords:Interstellar Medium, Low-mass Protostar, Protostellar Disk, Multiple
In these years, high capabilities in observational researches have opened new avenues in the star formation study. Various substructures in the vicinity of young stellar objects have recently been revealed, and their roles in the planet formation process are being discussed. As well, their origins are of great interesting. Especially, the formation of disk/envelope systems is closely related with the outflow launching via the angular momentum of the gas.
In this presentation, we report our ALMA observations for the Class 0 protostellar source IRAS 16293-2422. This source is a binary consisting of Source A and Source B, where Source A itself is a multiple source. We detected the substructure in the 1-mm and 3-mm dust continuum emission, tracing the protostars A1 and A2 in Source A. As well, we revealed the circummultiple structure surrounding Source A and the circumstellar disk of the protostar A1. Their kinematic structures traced by the C17O and H2CS lines are reproduced by simple physical models.
We also delineated an outflow structure near its origin point in the SO line. The northwest-southeast outflow shows a rotating motion. Comparing the specific angular momenta of the outflow and the disk/envelope structures, we found that the outflow can extract the angular momentum from the circumstellar disk. Understanding their mutual relation will provide us with an essential clue to the disk formation process in this young multiple source.
In this presentation, we report our ALMA observations for the Class 0 protostellar source IRAS 16293-2422. This source is a binary consisting of Source A and Source B, where Source A itself is a multiple source. We detected the substructure in the 1-mm and 3-mm dust continuum emission, tracing the protostars A1 and A2 in Source A. As well, we revealed the circummultiple structure surrounding Source A and the circumstellar disk of the protostar A1. Their kinematic structures traced by the C17O and H2CS lines are reproduced by simple physical models.
We also delineated an outflow structure near its origin point in the SO line. The northwest-southeast outflow shows a rotating motion. Comparing the specific angular momenta of the outflow and the disk/envelope structures, we found that the outflow can extract the angular momentum from the circumstellar disk. Understanding their mutual relation will provide us with an essential clue to the disk formation process in this young multiple source.