Oral Presentation
Multiple shells driven by disk winds ALMA observations in the HH 30 outflow
Presenter: Jesús Alejandro López-vázquez (ASIAA)
The HH 30 system is a typical protostellar object with an edge-on accretion disk, a ballistic bipolar jet, and a monopolar molecular outflow. I present archive Atacama Large Millimeter/Submillimeter Array (ALMA) Band 6 observations of the 13CO and 12CO molecular line emission of the protostellar system associated with HH 30. The 13CO molecular line shows the accretion disk while the molecular outflow is traced by the emission of the 12CO molecular line. The molecular outflow presents an internal cavity as well as multiple outflowing shell structures. We distinguish three different shells with constant expansion and possible rotation signatures. We find that the shells can be explained by magnetocentrifugal disk winds. The multiple shell structure may be the result of episodic ejections of the material from the accretion disk associated with three different epochs. Finally, our estimations of the linear and angular momentum rates of the outflow as well as the accretion luminosity are consistent with the expected values if the outflow of HH 30 is produced by a wide-angle disk wind.
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