Orion-Eridanus Superbubble
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Orion%E2%80%93Eridanus Superbubble
The Orion-Eridanus superbubble in soft X-rays

The Orion-Eridanus Superbubble or Eridanus Soft X-ray Enhancement is a superbubble located west of the Orion Nebula. The region is formed from overlapping supernova remnants that may be associated with the Orion OB1 stellar association; the bubble is approximately 1200 ly across.[1] It is the nearest superbubble to the Local Bubble containing the Sun, with the respective shock fronts being about 500 ly apart.[1]

The structure was discovered from 21 cm radio observations by Carl Heiles and interstellar optical emission line observations by Reynolds and Ogden in the 1970s.[2]

See also

References

  1. ^ a b Aschenbach, B.; Hermann-Michael Hahn; Joachim Truemper (1998). The invisible sky: ROSAT and the age of X-ray astronomy. Springer. ISBN 978-0-387-94928-4.
  2. ^ Sanders, Robert. "Bursting bubbles in the galactic disk appear to be source of hot gas permeating the Milky Way galaxy and its halo". University of California Berkeley.



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