Void galaxy explained

A void galaxy is a galaxy located in a cosmological void.[1] Few galaxies exist in voids; most are located in sheets, walls and filaments that surround voids and supervoids.[2] [3] Many void galaxies are connected through void filaments or tendrils,[4] less massive versions of the regular galaxy filaments that surround voids. These filaments are often straighter than their non-void counterparts due to the lack of influence by surrounding filaments.[5] These filaments can even be rich enough to form poor galaxy clusters.[6] The void galaxies themselves are thought to represent pristine examples of galactic evolution, having few neighbours, and likely to have formed from pure intergalactic gas.[7]

Formation

It is theorised by many astrophysicists that void galaxies are the result of large galactic filaments being pulled by the gravity of a major super cluster out of the less densely populated areas, causing voids such as the Boötes Void to grow. Galaxies such as MCG+01-02-015 are sometimes left behind from such events.[8]

List of void galaxies

GalaxyVoidFilamentNotesComments
PC 1357+4641Rowspan=15Boötes VoidEmission-line galaxy
IRAS 14288+5255[9] AGN X-ray source
G 1432+5302[10] Starburst galaxy
G 1458+4944LINER galaxy
G 1507+4554Starburst galaxy
G 1510+4727A & G 1510+4727BInteracting galaxy pair
BHI 1514+3819
FSS 1515+3823
G 1517+3949Starburst galaxy
G 1517+3956A & G 1517+3956BInteracting galaxy pair
IRAS 15195+5050AGN X-ray source
Markarian 845Seyfert 1 (X-ray source)
CG 547Rowspan=3Emission-line Galaxy
CG 637
CG 922
MCG+01-02-015[11] [12] [13] [14] LEDA 1852 (Pisces)
Pisces ARowspan=5Local Void[15]
Pisces B
NGC 7077[16]
NGC 6503
NGC 6789

See also

External links

Notes and References

  1. The Cosmically Depressed: Life, Sociology and Identity of Voids. 17 Dec 2009. 0912.3473v1. 2010ASPC..421...99V. Rien van de Weygaert. Platen. Erwin. Tigrak. Esra. Hidding. Johan. Thijs van der Hulst. Aragon-Calvo. Miguel A.. Stanonik. Kathryn. Jacqueline van Gorkom. Galaxies in Isolation: Exploring Nature Versus Nurture . 421 . 99 .
  2. Astronomische Nachrichten. On the emptiness of voids. SchmidtFirst1=K.-H.. Bohm. P.. Elsasser. H.. 318. 2. February 1997. 81. 10.1002/asna.2113180204. 1997AN....318...81S.
  3. Astronomy and Astrophysics, "Results of a search for faint galaxies in voids", Kuhn, B.; Hopp, U.; Elsaesser, H.;, 'v.318', 02/1997,
  4. Alpaslan . Mehmet . Robotham . Aaron S. G. . Obreschkow . Danail . Penny . Samantha . Driver . Simon . Norberg . Peder . Brough . Sarah . Brown . Michael . Cluver . Michelle . Holwerda . Benne . Hopkins . Andrew M. . van Kampen . Eelco . Kelvin . Lee S. . Lara-Lopez . Maritza A.. Maritza Lara-López . Liske . Jochen . Loveday . Jon . Mahajan . Smriti . Pimbblet . Kevin . Galaxy and Mass Assembly (GAMA): fine filaments of galaxies detected within voids . Monthly Notices of the Royal Astronomical Society: Letters . 2014-05-01 . 440 . 1 . L106–L110 . 10.1093/mnrasl/slu019. free . 1401.7331. 2014MNRAS.440L.106A.
  5. Monthly Notices of the Royal Astronomical Society. The Bridge Effect of Void Filaments. Daeseong. Park. Jounghun. Lee. 400. 2. December 2009. 1105–1108. 0905.4277v2. 2009MNRAS.400.1105P. 10.1111/j.1365-2966.2009.15524.x. free . 16612240.
  6. "Studies of Selected Voids. Faint Galaxies in the Direction of the Void 0049+05", G.T. Petrov, L. Slavcheva-Mihova, V. Kopchev, 2007' '
  7. arXiv, "Cosmic Voids: structure, dynamics and galaxies", Rien van de Weygaert, Erwin Platen, 16 Dec 2009,,
  8. Web site: Behold the Boötes void, the spookiest place in the cosmos. Dvorsky. George. io9. 6 July 2012 . en-US. 2019-08-25.
  9. The Astrophysical Journal Letters, "Detection of X-Ray Emission from Galaxies inside the Bootes Void", Chulhee Kim, Th. Boller, Kajal K. Ghosh, Douglas A. Swartz, Brian D. Ramsey, 'Volume 546, Number 2', 10 January 2001,
  10. The Astronomical Journal, "Spectroscopy of Galaxies in the Bootes Void", Shawn Cruzen 1, Tara Wehr, Donna Weistrop, Ronald J. Angione, Charles Hoopes, 'Volume 123, Number 1', 2002 January,
  11. Web site: The loneliest of galaxies. 9 November 2015. 10 November 2015. Hubble Space Telescope.
  12. SIMBAD, MCG+01-02-015
  13. Sci-News, "NASA’s Hubble Space Telescope Focuses on Lonely Galaxy", 9 November 2015
  14. SpaceDaily, "Hubble Views a Lonely Galaxy", 18 November 2015
  15. News: Hubble Sees Two Dwarf Galaxies in Pisces . Sci-News . 15 August 2016 .
  16. Web site: The Local Void. Tully. Brent.

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