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An H I absorption survey of M31 and M33 - The mixture of warm and cool phases in the interstellar media of spiral galaxies
(1993)
The VLA in A-array is used to survey the nearby spiral galaxies M31 and M33 in the 21-cm line in order to measure absorption by the H I toward background continuum sources. Spectral line cubes with rms noise less than 1.2 ...