Kinematics of Protostellar Objects in the ρ Ophiuchus A Region

We present the detection of infall, rotation and outflow kinematic signaturestowards both a protostellar source, VLA 1623 and what was initially thought tobe a pre-protostellar core, SM1N, in the rho-Ophiuchus A region. The kinematicsignatures of early star formation were detected in the dense molecular gassurrounding the embedded sources using high signal-to-noise millimeter andsubmillimeter data. Centroid velocity maps made with HCO+ J=4->3 and J=1->0line emission exhibit the blue bulge signature of infall, which is predicted tobe seen when infall motion dominates over rotational motion. Further evidencefor infalling gas is found in the HCO+ blue asymmetric line profiles and redasymmetric opacity profiles. We also performed CO J=3->2 and J=1->0observations to determine the direction, orientation, and extent of molecularoutflows, and report the discovery of a new bipolar outflow possibly driven bySM1N.Comment: 8 pages, 7 figures, accepted for publication in the Astrophysical Journa