Integrated intensity maps of the six lowest NH₃ inversion lines from VY CMa as observed with the VLA over the LSR velocity range of [−17, 85] km s−1 (relative velocity between ±51 km s−1). Horizontal and vertical axes represent the offsets (arcsec) relative to the fitted centre of the continuum in the directions of right ascension and declination, respectively. The circular restoring beam of 4.″ 0 is indicated in the bottom-left corner of each map. The contour levels for the NH₃ lines are drawn at: 3, 6, 9, 12, 15σ for (1, 1); 3, 6, 12, 18, 24σ for (2, 2) and(3, 3); 3, 6, 9, 12σ for (4, 4) to (6, 6), where σ = 14.2 mJy beam−1 km s−1.