
%0 Journal Article
%T 21 cm observations of NGC 55
%J Australian Journal of Physics
%D 1966/02/01
%V 19
%N 1
%P 111-127
%K 
%R https://doi.org/10.1071/BH660111
%U https://www.publish.csiro.au/paper/BH660111 
%X Observations of the irregular galaxy NGC 55 have been made at a wavelength of 21 cm using the 210 ft radio telescope at Parkes. Line profiles have been measured for a grid of 60 points spaced at intervals of 6 min of arc. The mass of neutral hydrogen in the system is 2 &#xb7;0 X 109 1110, assuming a distance of l &#x2022; 74 Mpc. The peaks of the profiles delineate a well-defined rotation curve, from which the total mass is found to be 2 &#x2022; 5 x l 010 1vf 0. The centroid of the hydrogen distribution and the centre of rotational symmetry are both displaced by about 3 min of arc from the nucleus of the system. 
