A Keplerian disk around a Class 0 source: ALMA observations of VLA1623A (Murillo et al.)

Vol. 560
In section 6. Interstellar and circumstellar matter

A Keplerian disk around a Class 0 source: ALMA observations of VLA1623A

by N. Murillo, S.-P. Lai, S. Bruderer, D. Harsono, and E. van Dishoeck, A&A 560, A103

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It has always been thought that the formation of a disk around a protostar must occur very early on during protostellar evolution. This should account for the jets or bipolar outflows associated with young "Class 0" protostars where accretion from the envelope is still occurring. In the article by Murillo et al. highlighted in this issue, the authors give evidence that there is a rather large disk (180 au radius) undergoing Keplerian rotation around a 0.2 solar mass central object associated with the class 0 object VLA1623A in Ophiucus. This interesting result is based on C18O(2-1) ALMA Cycle 0 early science results and demonstrates the potential in observations of this kind.