Maps of the continuum (top left), the [NII] line (top right), the CO(12−11) line (bottom left), and the [CI](1−0) line (bottom right). The size of the beam is indicated in the lower left corner. [NII] and CO(12−11) were integrated between −300 and +300 km s^-1. Since the [CI](1−0) line is narrower and fainter, it was integrated between −100 and +100 km s^-1 to maximize the signal-to-noise ratio. The beam in band 3 ([CI](1−0)) is much larger than in band 6. We thus stretch the x- and y-axis by a factor 3.