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Explosive ejection of matter associated with star formation in the Orion nebula

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Abstract

TIGHTLY collimated outflows of gas are often associated with regions of star formation; they interact with the ambient interstellar medium to produce the knots of shock-excited emission known as Herbig–Haro (HH) objects1,2. Two interpretations have been suggested for these objects: they may represent either the shocking of dense clumps of material that have been ejected into the surrounding molecular cloud3, or the interaction of stationary knots with fast, low-density jets4,5. Here we report the discovery of a complex of HH objects and associated wakes that require compact knots of material to have been ejected over a wide opening angle in a seemingly explosive event. Our observations suggest that, at least in this case, the former interpretation is correct, and they highlight the need to search other star-forming regions in order to establish the frequency of such events.

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Authors and Affiliations

  1. Anglo-Australian Observatory, PO Box 296, Epping, New South Wales, 2121, Australia

    David A. Allen & Michael G. Burton

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  1. David A. Allen
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  2. Michael G. Burton
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Allen, D., Burton, M. Explosive ejection of matter associated with star formation in the Orion nebula. Nature 363, 54–56 (1993). https://doi.org/10.1038/363054a0

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