Abstract
At a meeting that concerns itself with the amalgamation of northern and southern hemisphere data, I think it is appropriate to emphasize the effects that artificial boundaries such as this can have on the interpretation of astronomical data. HI shells and supershells are large-scale features, so that they often cross boundaries of any kind; their study is particularly susceptible to the existence of artificial boundaries.
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Heiles, C. (1983). Artificial Boundaries vs. HI Shells and Supershells. In: Burton, W.B., Israel, F.P. (eds) Surveys of the Southern Galaxy. Astrophysics and Space Science Library, vol 105. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7217-9_26
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