G-Cloud Explained

G-Cloud
Type:Interstellar cloud
Names:G Cloud[1]

The Galactic cloud, G cloud,[2] G-Cloud or G-Cloud complex, is an interstellar cloud located next to the Local Interstellar Cloud, within the Local Bubble. It is unknown whether the Solar System is embedded in the Local Interstellar Cloud or in the region where the two clouds are interacting, although the Solar System is currently moving towards the G-Cloud. The G-Cloud contains the stars Alpha Centauri (a triple star system that includes Proxima Centauri) and Altair (and possibly others).[3] [4] [5] [6] [7] [8]

Estimates for the n(H I) particle density in the direction of Alpha Centauri. were made in 2011 by Crawford[9] as 0.1 cm−3 and in 2014 by Gry[10] as 0.098 cm−3.

Notes and References

  1. NAME G Cloud. 15 March 2014.
  2. Swaczyna . Paweł . Schwadron . Nathan A. . Möbius . Eberhard . Bzowski . Maciej . Frisch . Priscilla C. . Linsky . Jeffrey L. . McComas . David J. . Rahmanifard . Fatemeh . Redfield . Seth . Winslow . Réka M. . Wood . Brian E. . Zank . Gary P. . 2022-10-01 . Mixing Interstellar Clouds Surrounding the Sun . The Astrophysical Journal Letters . 937 . 2 . L32 . 10.3847/2041-8213/ac9120 . free . 2209.09927 . 2022ApJ...937L..32S . 2041-8205.
  3. Web site: Our Local Galactic Neighborhood . Interstellar.jpl.nasa.gov . 7 October 2015 . https://web.archive.org/web/20131121061128/http://interstellar.jpl.nasa.gov/interstellar/probe/introduction/neighborhood.html . 21 November 2013 . dead .
  4. Web site: Paul Gilster . Into the Interstellar Void . Centauri-dreams.org . 1 September 2010.
  5. Web site: The Interstellar Medium . 22 October 2012 . dead . https://web.archive.org/web/20120419110121/http://jila.colorado.edu/research/astrophysics/interstellar-medium . 19 April 2012 .
  6. Web site: Physical Properties of the Local Interstellar Medium . Seth Redfield . 2009 . Igpp.ucla.edu . 22 October 2012 . 11 August 2014 . https://web.archive.org/web/20140811164441/http://www.igpp.ucla.edu/public/mkivelso/refs/PUBLICATIONS/Redfield%20LISM.pdf . dead .
  7. Frisch. . Priscilla . Local Interstellar Matter: The Apex Cloud . The Astrophysical Journal . 593 . 2 . 868–873 . 3 February 2003 . 10.1086/376684 . astro-ph/0302037 . 2003ApJ...593..868F . 7087871 .
  8. Web site: Short Sharp Science: Spacecraft probes gas cloud swaddling the solar system . Newscientist.com . 2 February 2012.
  9. Crawford . Ian A. . 2011-04-01 . Project Icarus: A review of local interstellar medium properties of relevance for space missions to the nearest stars . Acta Astronautica . en . 68 . 7 . 691–699 . 10.1016/j.actaastro.2010.10.016 . 1010.4823 . 2011AcAau..68..691C . 101553 . 0094-5765.
  10. Gry . Cécile . Jenkins . Edward B. . July 2014 . The interstellar cloud surrounding the Sun: a new perspective . Astronomy & Astrophysics . 567 . A58 . 10.1051/0004-6361/201323342 . 1404.0326 . 2014A&A...567A..58G . 118571335 . 0004-6361.

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