Ammonia in the hot core W51-IRS2: 12 new maser lines and a maser component with a velocity drift

C. Henkel, T. L. Wilson, H. Asiri +1

With the 100-m telescope at Effelsberg, 19 ammonia (NH3) maser lines have been detected toward the prominent massive star forming region W51-IRS2. Eleven of these inversion lines,…