A multiwavelength picture of the AFGL 5142 star - formingregionTodd

We present molecular line, H 2 O maser, radio continuum and near infrared maps of the bipolar outtow source AFGL 5142. The high resolution of our molecular CO observations enables us to deene the morphology of the large-scale bipolar outtow into a two lobe structure extending for 2 0 on each side of the center. In the perpendicular direction, we nd consistent evidence for a second, more compact (< 0:5 0) outtow in the form of a spatial velocity ooset in the CO map and of an H 2 jet-like structure derived from a near infrared narrow band image. On a smaller scale size, the radio and infrared continuum observations reveal the engines of the molecular outtows. The maser emission occurs near the position of the most embedded source of the cluster, IRS1. This is located at the center of the compact outtow and jets of shocked H 2 and coincides with an ultra compact (UC) radio continuum source (most probably an ionized stellar wind). The H 2 O cluster is composed of ve spatial components: two are within 0:2{0:3 00 from the YSO (a few hundred AU) and three are at larger distance (1:5{2 00 , a few thousand AU). A marginal detection of proper motion of the two more distant masers may suggest a high expansion velocity at a distance 4 10 3 AU from the YSO, similar to what is found in Orion KL and W49N. The brightest NIR source of the cluster (IRS2) is associated with an IRAS point source and lies along the axis of the large-scale bipolar outtow. We propose that the masers and the compact molecular outtow are powered concurrently by the wind from the YSO associated with IRS1, while the large scale outtow could be the remnant from the formation of IRS2.