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 the spiral galaxy MCG+01-02-015 are sometimes left behind from such events. [8]
| Galaxy | Picture | Void | Filament | Notes | Comments |
|---|---|---|---|---|---|
| Pisces A | | Local Void | [9] | ||
| Pisces B | | [9] | |||
| NGC 7077 | | [10] | |||
| NGC 6503 | | ||||
| NGC 6789 | | ||||
| MCG +01-02-015 | | 0049+05 Void | [11] [12] [13] [14] | LEDA 1852 (Pisces) | |
| LEDA 3096313 | | Boötes Void | [15] | Emission-line galaxy | |
| LEDA 84225 | | [15] | AGN X-ray source | ||
| LEDA 87383 | | [16] | Starburst galaxy | ||
| LEDA 2790865 | | [15] [16] | LINER galaxy, Emission-line Galaxy | ||
| LEDA 87386 | | [16] | Starburst galaxy | ||
| LEDA 87385 | | [16] | Interacting galaxy pair | ||
| LEDA 101388 | | [15] | Seyfert 2 galaxy | ||
| LEDA 101389 | | [15] | Elliptical galaxy | ||
| LEDA 100709 | | [16] | Starburst galaxy | ||
| LEDA 54705 | | [16] | Interacting galaxy pair | ||
| MCG +09-25-043 | | [15] | AGN X-ray source | ||
| Markarian 845 | | [15] | Seyfert 1 (X-ray source) | ||
| LEDA 87384 | | [15] | Emission-line Galaxy | ||
| LEDA 2103063 | | [15] | |||
| LEDA 1147360 | | [17] | Active galaxy nucleus candidate | ||
| SDSS J123644.69+003348.1 | | [17] | Active galaxy nucleus candidate | ||
| LEDA 1166549 | | [17] | HII galaxy | ||
| 2dFGRS TGN266Z051 | | [17] | Seyfert 1 | ||
| 2MASX J12401820-0011064 | | [17] | Seyfert 1 | ||
| LEDA 1160233 | | [17] | Active galaxy nucleus candidate | ||
| LEDA 1161018 | | [17] | |||
| LEDA 1186186 | | [17] | Active galaxy nucleus candidate | ||
| LEDA 1110510 | | [17] | Active galaxy nucleus candidate | ||
| MCG +00-25-010 | | [17] | Seyfert 1 | ||
| GAMA 279943 | | [17] | Active galaxy nucleus candidate | ||
| LEDA 2653526 | | [17] | Active galaxy nucleus candidate | ||
| SHOC 239 | | [17] | HII galaxy | ||
| LEDA 2790881 | | [17] | Seyfert 1 | ||
| MaNGA 43-22 | | [17] | Active galaxy nucleus candidate | ||
| LEDA 29070 | | [17] | Active galaxy nucleus candidate | ||
| LEDA 28747 | | [17] | Active galaxy nucleus candidate | ||
| LEDA 2534153 | | [17] | Active galaxy nucleus candidate | ||
| MCG +10-15-008 | | [17] | Active galaxy nucleus candidate | ||
| Markarian 234 | | [17] | HII galaxy, Active galaxy nucleus candidate | ||
| LEDA 2677771 | | [17] | Seyfert 1 | ||
| LEDA 3129299 | | [17] | Active galaxy nucleus candidate | ||
| LEDA 3132190 | | [17] | HII galaxy | ||
| NSA 12777 | | [17] | Seyfert 1 | ||
| LEDA 2675385 | [17] | Active galaxy nucleus candidate | |||
| SHOC 306 | [17] | HII galaxy | |||
| ASK 047216.0 | [17] | Active galaxy nucleus candidate | |||
| Markarian 89 | [17] | Seyfert 1 | |||
| SHOC 461 | [17] | HII galaxy | |||
| LEDA 2678872 | [17] | HII galaxy, Seyfert 1 | |||
| NSA 12860 | [17] | Active galaxy nucleus candidate | |||
| LEDA 3139336 | [17] | ||||
| LEDA 2815866 | [17] | Emission-line Galaxy | |||
| LEDA 2690461 | [17] | Active galaxy nucleus candidate | |||
| Z 19-3 | [17] | Active galaxy nucleus candidate | |||
| LEDA 4006977 | [17] | ||||
| LEDA 1206223 | [17] | Active galaxy nucleus candidate | |||
| NSA 14156 | [17] | ||||
| LEDA 1214845 | [17] | Active galaxy nucleus candidate | |||
| LEDA 1223466 | [17] | Active galaxy nucleus candidate | |||
| KK 242 | satellite galaxy of NGC 6503 |