Galactic corona

Galactic corona

The terms galactic corona and gaseous corona have been used in the first decade of the twenty-first century to describe a hot, ionised, gaseous component in the Galactic halo of the Milky Way. A similar body of very hot and tenuous gas in the halo of any spiral galaxy may also be described by these terms.

This coronal gas may be sustained by the galactic fountain, in which superbubbles of ionised gas from supernova remnants expand vertically through galactic chimneys into the halo. As the gas cools, it is pulled back into the galactic disc of the galaxy by gravitational forces.

ee also

* Galaxy formation and evolution
* Galactic coordinate system
* Galactic bulge
* Disc galaxy
** Spiral arm
* Galactic halo
* Galactic spheroid

External links

* [http://antwrp.gsfc.nasa.gov/diamond_jubilee/papers/lamb/node4.html THE GALACTIC CORONA] , Jerry Bonnell, 1995
* [http://arxiv.org/abs/astro-ph/0309693 Absorption Line Studies in the Halo] , Philipp Richter, 2003
* [http://arxiv.org/abs/astro-ph/0505299 Multi-phase High-Velocity Clouds toward HE 0226-4110 and PG 0953+414] , Andrew J. Fox et.al., 2005
* [http://arxiv.org/abs/astro-ph/0511621 Galactic Corona or Local Group Intergalactic Medium?] , Rik J. Williams, Smita Mathur, & Fabrizio Nicastro, 2005
* [http://chandra.harvard.edu/photo/2006/n5746/ NGC 5746: Detection of Hot Halo Gets Theory Out of Hot Water]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Galactic halo — The term galactic halo is used to denote an extended, roughly spherical component of a galaxy, which extends beyond the main, visible component. It can refer to any of several distinct components which share these properties: * the galactic… …   Wikipedia

  • Galactic coordinate system — Artist s depiction of the Milky Way galaxy, showing the galactic longitude relative to the sun. The galactic coordinate system (GCS) is a celestial coordinate system which is centered on the Sun and is aligned with the apparent center of the… …   Wikipedia

  • Active galactic nucleus — An active galactic nucleus (AGN) is a compact region at the centre of a galaxy which has a much higher than normal luminosity over some or all of the electromagnetic spectrum (in the radio, infrared, optical, ultra violet, X ray and/or gamma ray… …   Wikipedia

  • Bulge (astronomy) — Galactic center redirects here. For the center of the Milky Way galaxy, see Galactic Center. In astronomy, a bulge is a tightly packed group of stars within a larger formation. The term almost exclusively refers to the central group of stars… …   Wikipedia

  • Spiral galaxy — A spiral galaxy is a galaxy belonging to one of the three main classes of galaxy originally described by Edwin Hubble in his 1936 work “The Realm of the Nebulae” [cite book |last=Hubble |first=E. P. |authorlink=Edwin Hubble |title=The Realm of… …   Wikipedia

  • Couronne galactique — Les termes couronne galactique et couronne gazeuse sont utilisés depuis la première décennie du XXIe siècle pour décrire une composante du halo galactique de la Voie lactée constituée de gaz chaud ionisé. Ces termes peuvent également s… …   Wikipédia en Français

  • Disc (galaxy) — The Sculptor Galaxy (NGC 253) is an example of a disc galaxy A disc is a component of disc galaxies, such as spiral galaxies, or lenticular galaxies. The galactic disc is the plane in which the spirals, bars and discs of disc galaxies exist.… …   Wikipedia

  • Galaxy formation and evolution — The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have… …   Wikipedia

  • Open cluster — Galactic cluster redirects here. See also galaxy groups and clusters NGC 265, an open star cluster in the Small Magellanic Cloud An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and… …   Wikipedia

  • Sun — This article is about the star. For other uses, see Sun (disambiguation). The Sun …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”