Astronomy:Void galaxy
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Short description: Galaxy found in a cosmological void
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] 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.[4] 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
| 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] |
See also
References
- ↑ Rien van de Weygaert; Platen, Erwin; Tigrak, Esra; Hidding, Johan; Thijs van der Hulst; Aragon-Calvo, Miguel A.; Stanonik, Kathryn; Jacqueline van Gorkom (17 Dec 2009). "The Cosmically Depressed: Life, Sociology and Identity of Voids". Galaxies in Isolation: Exploring Nature Versus Nurture 421: 99. Bibcode: 2010ASPC..421...99V.
- ↑ SchmidtFirst1=K.-H.; Bohm, P.; Elsasser, H. (February 1997). "On the emptiness of voids". Astronomische Nachrichten 318 (2): 81. doi:10.1002/asna.2113180204. Bibcode: 1997AN....318...81S.
- ↑ 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
- ↑ 4.0 4.1 Park, Daeseong; Lee, Jounghun (December 2009). "The Bridge Effect of Void Filaments". Monthly Notices of the Royal Astronomical Society 400 (2): 1105–1108. doi:10.1111/j.1365-2966.2009.15524.x. Bibcode: 2009MNRAS.400.1105P.
- ↑ Alpaslan, Mehmet; Robotham, Aaron S. G.; Obreschkow, Danail; Penny, Samantha; Driver, Simon; Norberg, Peder; Brough, Sarah; Brown, Michael et al. (2014-05-01). "Galaxy and Mass Assembly (GAMA): fine filaments of galaxies detected within voids". Monthly Notices of the Royal Astronomical Society: Letters 440 (1): L106–L110. doi:10.1093/mnrasl/slu019. Bibcode: 2014MNRAS.440L.106A.
- ↑ "Studies of Selected Voids. Faint Galaxies in the Direction of the Void 0049+05", G.T. Petrov, L. Slavcheva-Mihova, V. Kopchev, 2007' '
- ↑ arXiv, "Cosmic Voids: structure, dynamics and galaxies", Rien van de Weygaert, Erwin Platen, 16 Dec 2009, arXiv:0912.2997, Bibcode: 2009arXiv0912.2997V
- ↑ Dvorsky, George (6 July 2012). "Behold the Boötes void, the spookiest place in the cosmos" (in en-US). https://io9.gizmodo.com/behold-the-bootes-void-the-spookiest-place-in-the-cosm-5923493.
- ↑ 9.0 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 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
- ↑ 10.0 10.1 10.2 10.3 10.4 10.5 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
- ↑ "The loneliest of galaxies". Hubble Space Telescope. 9 November 2015. http://www.spacetelescope.org/images/potw1545a/.
- ↑ SIMBAD, MCG+01-02-015
- ↑ Sci-News, "NASA’s Hubble Space Telescope Focuses on Lonely Galaxy", 9 November 2015
- ↑ SpaceDaily, "Hubble Views a Lonely Galaxy", 18 November 2015
- ↑ 15.0 15.1 "Hubble Sees Two Dwarf Galaxies in Pisces". Sci-News. 15 August 2016. http://www.sci-news.com/astronomy/hubble-dwarf-galaxies-pisces-04103.html.
- ↑ Tully, Brent. "The Local Void". http://amiga.iaa.es/FCKeditor/UserFiles/File/cig09/Tully.pdf.
External links
- Panjkov, Sonja (22 April 2023). "Is One Really the Loneliest Number? Void Galaxies Compared to Their More Popular Counterparts in the Field". https://astrobites.org/2023/04/22/lonely-void-galaxies/.
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