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[4] or tendrils,[5] lightweight versions of the regular galaxy filaments that surround voids. These filaments are often straighter than their regular counterparts due to the lack of influence by surrounding filaments.[4] These filaments can even be rich enough to form poor groups of galaxies.[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]

FormationEdit

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 events such as these.[8]

List of void galaxiesEdit

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

ReferencesEdit

  1. ^ Rien van de Weygaert; Platen, Erwin; Tigrak, Esra; Hidding, Johan; Thijs van der Hulst; Aragon-Calvo, Miguel A.; Stanonik, Kathryn; Jacqueline van Gorkom (17 December 2009). "The Cosmically Depressed: Life, Sociology and Identity of Voids". arXiv:0912.3473v1. Bibcode:2009arXiv0912.3473V. {{cite journal}}: Cite journal requires |journal= (help)
  2. ^ SchmidtFirst1=K.-H.; Bohm, P.; Elsasser, H. (February 1997). "On the emptiness of voids". Astronomische Nachrichten. 318 (2): 81. Bibcode:1997AN....318...81S. doi:10.1002/asna.2113180204.
  3. ^ Astronomy and Astrophysics, "Results of a search for faint galaxies in voids", Kuhn, B.; Hopp, U.; Elsaesser, H.;, 'v.318', 02/1997, Bibcode:1997A&A...318..405K
  4. ^ a b Park, Daeseong; Lee, Jounghun (December 2009). "The Bridge Effect of Void Filaments". Monthly Notices of the Royal Astronomical Society. 400 (2): 1105–1108. arXiv:0905.4277v2. Bibcode:2009MNRAS.400.1105P. doi:10.1111/j.1365-2966.2009.15524.x. S2CID 16612240.
  5. ^ 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.; Liske, Jochen; Loveday, Jon; Mahajan, Smriti; Pimbblet, Kevin (1 May 2014). "Galaxy and Mass Assembly (GAMA): fine filaments of galaxies detected within voids". Monthly Notices of the Royal Astronomical Society: Letters. 440 (1): L106–L110. arXiv:1401.7331. Bibcode:2014arXiv1401.7331A. doi:10.1093/mnrasl/slu019.
  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, arXiv:0912.2997, Bibcode:2009arXiv0912.2997V
  8. ^ Dvorsky, George. "Behold the Boötes void, the spookiest place in the cosmos". io9. Retrieved 25 August 2019.
  9. ^ a b c d e f g h i 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, doi:10.1086/318868
  10. ^ a b c d e f 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, doi:10.1086/324739
  11. ^ "The loneliest of galaxies". Hubble Space Telescope. 9 November 2015. Retrieved 10 November 2015.
  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. ^ a b "Hubble Sees Two Dwarf Galaxies in Pisces". Sci-News. 15 August 2016.
  16. ^ Tully, Brent. "The Local Void" (PDF).