ALMA CO(1-0) data for IRAS F20551−4250. Top left: moment-zero map. Overplotted are contours for outflow in the range [210, 510] km s−1 (red) and the tentative outflow in [−510, −210] km s−1 (blue), with contours at [0.5, 0.7, 1.0] mJy beam−1. Top right: spectrum at the position of red outflow (right half) and blue outflow (left half). Each spectrum, including the part not shown here, is decomposed into four Gaussians, three for the host line profile and one for outflow (green). The black line includes all four Gaussian components. The insert compares the sum of the outflow fits to an r = 0.6″ aperture spectrum. Center left: center positions and their errors, from UV fitting a Gaussian model to individual velocity channels. Center and bottom right: position-velocity diagrams for two orthogonal position angles. Molecular outflow is seen strongly on the red and weakly on the blue side of the line core, with spatial shifts better matching the PA +45° PV diagram.
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