Continuum images and H I absorption moment 0 map. The black contours represent the image with natural weighting, which start at 3σ noise and increase by a factor of 2, while the green contours show the image with uniform weighting, which start at 3σ noise and increase by a factor of 2. The color image is the H I absorption moment 0 map with natural weighting. Only pixels with absorption stronger than 1.5σ are shown, where σ is the noise of the map. The right color bar shows the depth of the absorption. The map contains three unresolved regions, compared to the beam size. H I absorption lines were extracted from the peak absorption pixels of the three regions, which are presented in Fig. 2.