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]
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]
This list is incomplete; you can help by adding missing items. (September 2010) |
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] |
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