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. Kuhn . B. . Hopp . U. . Elsaesser . H. . February 1997 . Results of a search for faint galaxies in voids. . Astronomy and Astrophysics . 318 . 405–415 . 1997A&A...318..405K . 0004-6361.
  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. Petrov . G.T. . Slavcheva-Mihova . L. . Kopchev . V. . 2007 . Studies of Selected Voids. Faint Galaxies in the Direction of the Void 0049+05 . Bulg. J. Phys . 34 . 2 . 385–390.
  7. Van De Weygaert . Rien . Platen . Erwin . 2011 . Cosmic Voids: Structure, Dynamics and Galaxies . International Journal of Modern Physics: Conference Series . en . 01 . 41–66 . 0912.2997 . 2011IJMPS...1...41V . 10.1142/S2010194511000092 . 2010-1945.
  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. Kim . Chulhee . Boller . Th. . Ghosh . Kajal K. . Swartz . Douglas A. . Ramsey . Brian D. . January 2001 . Detection of X-Ray Emission from Galaxies inside the Bootes Void . The Astrophysical Journal . 546 . 2 . L91–L95 . 10.1086/318868. 2001ApJ...546L..91K .
  10. Cruzen . Shawn . Wehr . Tara . Weistrop . Donna . Angione . Ronald J. . Hoopes . Charles . January 2002 . Spectroscopy of Galaxies in the Bootes Void . The Astronomical Journal . 123 . 1 . 142–158 . 10.1086/324739. 2002AJ....123..142C .
  11. Web site: The loneliest of galaxies. 9 November 2015. 10 November 2015. Hubble Space Telescope.
  12. MCG+01-02-015.
  13. Web site: 2015-11-09 . NASA's Hubble Space Telescope Focuses on Lonely Galaxy . 2024-09-21 . Sci.News . en-US.
  14. Web site: November 18, 2015 . Hubble Views a Lonely Galaxy . 2024-09-21 . Space Daily.
  15. News: Hubble Sees Two Dwarf Galaxies in Pisces . Sci-News . 15 August 2016 .
  16. Web site: Tully . Brent . The Local Void . https://web.archive.org/web/20091215060031/http://amiga.iaa.es/FCKeditor/UserFiles/File/cig09/Tully.pdf . 2009-12-15 . AMIGA - Analysis of the interstellar Medium of Isolated Galaxies.

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