A new general survey of high-velocity neutral hydrogen in the Southern Hemisphere

Abstract

A southern sky survey in the H I 21 cm line, at declinations between-90° and-15°, was done at the Instituto Argentino de Radioastronomía. The observations were made on a 2°/cos 0X2° grid, covering a velocity range between-650 and +650 km s-1 , with an angular resolution of 34' (HPBW) and a velocity resolution of 16 km s-1. The rms noise on the spectra is 0.025 K. The results are presented in a table and maps. A whole-sky map containing all known data on high-velocity H i is also included.