Orion–Eridanus Superbubble
Structure in the Milky Way Galaxy
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/Orion-Eridanus_Superbubble_ROSAT.png/122px-Orion-Eridanus_Superbubble_ROSAT.png)
Soft X-ray image of the Orion-Eridanus Superbubble with ROSAT.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Orion-Eridanus_superbubble_ha_labeled.png/122px-Orion-Eridanus_superbubble_ha_labeled.png)
The Orion-Eridanus superbubble in Hydrogen-alpha, with the Barnard's Loop and Eridanus Loop. Image covers the same area of the sky as the left image.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4d/Orion-Eridanus_Bubble.gif/136px-Orion-Eridanus_Bubble.gif)
Part of the Orion-Eridanus Superbubble with ROSAT. The contours are 100 Mircon IRAS observations and show the shielding of soft x-rays by a filament.
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
- Barnard's Loop
References
- ^ 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.
- ^ 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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