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Paper: MERLIN & VLA Observations of HI Absorption in M 82
Volume: 240, Gas and Galaxy Evolution: A Conference in Honor of the 20th Anniversary of the VLA
Page: 402
Authors: Pedlar, A.; Wills, K. A.; Muxlow, T. W. B.; Das, M.
Abstract: We present MERLIN and VLA 21 cm observations of atomic hydrogen (HI) absorption seen against the central region of the starburst galaxy M 82. The dynamics and structure of the HI absorbing gas is compared with molecular (CO) and ionised ([Ne II]) gas in M 82 on arcsecond (15 pc) scales. Although we see clear evidence in our HI observations for the CO `expanding superbubble' discussed by Weiss et al. (1999), we note that this feature can also be interpreted in terms of non-circular motions characteristic of gas dynamics in bars.
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