Loop I Bubble

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Loop I Bubble
3D representation of the Local Bubble (grey) with neighbouring Molecular Clouds (magenta) and a section of the Loop I Bubble (cyan).
Observation data: J2000.0[1] epoch
Right ascension14h 59m [1]
Declination−38.3° [1]
Distance200 [2] pc
DesignationsLoop I, Loop I Bubble, Loop I Superbubble, Loop I Supershell[2]
See also: Lists of nebulae

The Loop I Bubble is a cavity in the interstellar medium (ISM) of the Orion Arm of the Milky Way. From our Sun's point of view, it is situated towards the Galactic Center of the Milky Way galaxy. Two conspicuous tunnels connect the Local Bubble with the Loop I Bubble cavity (the Lupus Tunnel).[3] The Loop I Bubble is a supershell.[2]

The Loop I Bubble is located roughly 100 parsecs, or 330 light years, from the Sun. The Loop I Bubble was created by supernovae and stellar winds in the Scorpius–Centaurus Association, some 500 light years from the Sun. The Loop I Bubble contains the star Antares (also known as Alpha Scorpii). Several tunnels connect the cavities of the Local Bubble with the Loop I Bubble, called the "Lupus Tunnel".[3]

See also[edit]


  1. ^ a b c "NAME Loop I". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 15 March 2014.
  2. ^ a b c Roland J. Egger, Bernd Aschenbach (February 1995). "Interaction of the Loop I supershell with the Local Hot Bubble". Astronomy and Astrophysics. 294 (2): L25-L28. arXiv:astro-ph/9412086. Bibcode:1995A&A...294L..25E.
  3. ^ a b Lallement, R.; Welsh, B. Y.; Vergely, J. L.; Crifo, F.; Sfeir, D. (2003). "3D mapping of the dense interstellar gas around the Local Bubble". Astronomy and Astrophysics. 411 (3): 447. Bibcode:2003A&A...411..447L. doi:10.1051/0004-6361:20031214.