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A high-resolution image of atomic hydrogen in the M81 group of galaxies

Yun, M. S. and Ho, P. T. P. and Lo, K. Y. (1994) A high-resolution image of atomic hydrogen in the M81 group of galaxies. Nature, 372 (6506). pp. 530-532. ISSN 0028-0836.

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It has long been recognized that interactions between galaxies are important in determining their evolution. The distribution of gas—out of which new stars are formed—is strongly affected; in particular, gas may be concentrated near the nucleus, leading to a burst of star formation. Here we present a map of atomic hydrogen (H I) in the nearest interacting group of galaxies (that dominated by M81), obtained by combining 12 separate fields observed with the Very Large Array. The H i that surrounds M81, M82 and NGC3077 (the most prominent galaxies in the group) is dominated by filamentary structures, clearly demonstrating the violent disruption of this system by tidal interactions. These observations should have detected all H I complexes more massive than 106 solar masses, meaning that our map contains all structures that might evolve into new dwarf galaxies.

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Yun, M. S.0000-0001-7095-7543
Additional Information:© 1994 Nature Publishing Group. Received 19 July; accepted 9 November 1994. NRAO and VLA are operated by Associated Universities. Inc., under cooperative agreement with the US National Science Foundation.
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Issue or Number:6506
Record Number:CaltechAUTHORS:20150514-083204115
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57520
Deposited By: Tony Diaz
Deposited On:14 May 2015 18:47
Last Modified:09 Mar 2020 13:19

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