Oral Presentation

A Keplerian disk fed by accretion streamers in the embedded Class I source Oph IRS63

Author(s): Christian Flores (ASIAA), Nagayoshi Ohashi (ASIAA), and the eDisk collaboration

Presenter: Christian Alejandro Flores gonzalez (ASIAA)

In the context of the Early Planet Formation in Embedded Disks (eDisk) large program, we present ALMA observations of the Class I source Oph IRS63. Previous works on this source have shown annular dust disk structures and a large gaseous envelope. Yet, no high-resolution and high-sensitivity gas observations have been obtained until now. Our ALMA observations of Oph IRS63 show a myriad of protostellar-like features, such as a shell-like bipolar outflow (in 12CO), an extended envelope rotating structure (in 13CO), a large-scale streamer connecting the envelope to the disk (in C18O), and several small-scale spiral structures seen towards the edge of the dust continuum (in SO). We model the streamer and spiral structures as features originating from an infalling rotating envelope that continuously feeds the young protostellar disk. Furthermore, by analyzing the velocity pattern of the molecular tracers, we measure a central protostellar mass of ~0.5 Msun and confirm the presence of a Keplerian rotating disk extending up to ~300 au. In the workshop, we will discuss how the previously discovered dust disk rings can appear despite the intense outflowing activity and the significant amount of fresh material funneled from the cloud to the disk.