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Commonplace at every evolutionary stage, Multiple Protostellar Systems (MPSs)are thought to be formed through fragmentation, but it is unclear when and how.The youngest MPSs, which have not yet undergone much evolution, provideimportant constraints to this question. It is then of interest to disentangleearly stage MPSs. In this letter we present the results of our work on VLA1623using our observations and archival data from the Submillimeter Array (SMA).Our continuum and line observations trace VLA1623's components, outflow andenvelope, revealing unexpected characteristics. We construct the SED for eachcomponent using the results of our work and data from literature, as well asderive physical parameters from continuum and perform a simple kinematicalanalysis of the circumstellar material. Our results show VLA1623 to be a triplenon-coeval system composed of VLA1623A, B & W, with each source driving its ownoutflow and unevenly distributed circumstellar material. From the SED, physicalparameters and IR emission we conclude that VLA1623A & W are Class 0 and Iprotostars, respectively, and together drive the bulk of the observed outflow.Furthermore, we find two surprising results, first the presence of a rotatingdisk-like structure about VLA1623A with indications of pure Keplerian rotation,which, if real, would make it one of the first evidence of Keplerian diskstructures around Class 0 protostars. Second, we find VLA1623B to be a bonafideextremely young protostellar object between the starless core and Class 0stages.

Disentangling the entangled: Observations and analysis of the triple non-coeval protostellar system VLA1623