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Fig. 1


Positions of water, methanol, and hydroxyl maser features superimposed on the 2 cm continuum contour map of NGC 7538-IRS 1 observed with the VLA in 1986 (Franco-Hernández & Rodríguez 2004). Contours are 1, 2, 4, 8, 16  × 1.3 mJy beam-1. The (0,0) position is and δ2000 =  + 61°28′10′′.441. Blue circles and red triangles indicate the positions of the H2O and CH3OH maser features, respectively, with their linear polarization vectors (60 mas correspond to a linear polarization fraction of 1%). Green boxes indicate the positions of the OH masers detected by Hutawarakorn & Cohen (2003) with their linear polarization vectors (thick lines, 6 mas correspond to 1%). The two arrows indicate the direction of the bipolar outflow (~140°).

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