Void galaxy

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	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

See also

• Field galaxy