Fig. 1

Continuum emission towards IRAS 23033+5951 at 1.37 mm, with a phase center at RA 23h 05m 25. s00 and Dec +60° 08′ 15.′′49 (J2000.0). The black contours indicate the 5, 10, 15, 20σ levels and increase further in steps of 20σ, where σ = 0.28 mJy beam−1. The corresponding negative values are absent in the presented region. The white + and labels mark the mm sources identified by CLUMPFIND. The green, red, and blue symbols are cm point sources, H2 O masers (both Rodríguez et al. 2012), and methanol masers (Rodríguez-Garza et al. 2017), respectively. The shaded ellipse in the bottom left shows the synthesized beam of 0.45′′ × 0.37′′ (PA 47°). The small panels zoom in on the elongation of the core MMS1a (b,c), MMS1a (d), MMS1b (e), MMS1c (f) and MMS2a (g).
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