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Fig. 2


Longitude and latitude surface brightness profiles in the range −65° <  < 65° and −1° < b < 1° for the observations and for the initial model (Sect. 4.1). The thick black lines show the observed surface brightness, while the colored lines and the gray shaded area show the model surface brightness, with the same colors as used in Fig. 1. The “traditional” spiral arm tangencies are indicated in the top panel.

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