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


  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.

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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