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A giant intergalactic H I bubble near Arpl43

Nature volume 330, pages 140–142 (1987)Cite this article

An Erratum to this article was published on 03 December 1987

Abstract

We present observations of the nearby ring galaxy Arpl43 (NGC2445/4) and describe the discovery of a giant H I shell 20 kpc across, lying 100 kpc from Arpl43. The shell, which shows evidence for line splitting near its centre, lies in a long H I filament pointing towards the Arpl43 system. We suggest that the shell is an expanding bubble of H I, and is direct evidence for a powerful galactic-scale explosion 108 years ago which we associate with a strong burst of star formation. We believe that both the ring galaxy and the giant bubble have their origin in the passage of a gas-rich companion through the inner disk of NGC2445, and its subsequent disruption.

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References

  1. 1. Braun, R. thesis, Univ. Leiden (1985). 2. Toomre, A. in IAU Symp. No. 79, 109-116 (1978). 3. Tremaine, S. in The Structure and Evolution of Normal Galaxies (ed. Fall, S. M. & Lynden-Bell, D.) 67-84 (Cambridge University Press, 1981). 4. Schombert, J. M. & Wallin, J. F. Astrophys. J. (in the press). 5. Hogbom, J. A. Astr. Astrophys. Supp. 15, 417-426 (1974).

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Authors and Affiliations

  1. School of Physics and Astronomy, Lancashire Polytechnic, Preston, PR1 2TQ, UK

    P. N. Appleton

  2. Department of Astronomy, University of Minnesota, Minnesota, 55455, USA

    F. D. Ghigo

  3. National Radio Astronomy Observatory, VLA Project, PO Box 0, Socorro, New Mexico, 87801, USA

    J. H. van Gorkom

  4. Palomar Observatory, California Institute of Technology, Pasadena, California, 91125, USA

    James M. Schombert

  5. Astronomy Program, 12 Physics Building, Iowa State University, Ames, Iowa, 50011, USA

    Curtis Struck-Marcell

Authors
  1. P. N. Appleton
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  2. F. D. Ghigo
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  3. J. H. van Gorkom
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  4. James M. Schombert
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  5. Curtis Struck-Marcell
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Appleton, P., Ghigo, F., van Gorkom, J. et al. A giant intergalactic H I bubble near Arpl43. Nature 330, 140–142 (1987). https://doi.org/10.1038/330140a0

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  • DOI: https://doi.org/10.1038/330140a0

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