We thank Bo Reipurth for his comments on this paper and for discussion on jets from massive young stars. JM acknowledges partial support by DGICYT (PB97-0903) and by Junta de Andalucía (Spain). LFR acknowledges the support of DGAPA, UNAM, and of CONACyT, México. JMT is supported in part by DGICYT grant PB95-0066 and by Junta de Andalucía (Spain).
© European Southern Observatory (ESO) 1999
Online publication: April 12, 1999