Void galaxies are galaxies which exist in cosmological voids.^[1] Few galaxies exist in voids; most galaxies exist in sheets, walls and filaments that surround voids and supervoids.^[2][3] Many of the void galaxies are connected through void filaments, lightweight versions of the regular galaxy filaments that surround voids, to each other. 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.^[5] 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.^[6]

" Cosmic filaments play a role of bridges along which matter and gas accrete on to galaxies to trigger star formation and feed central black holes." " It is shown that the void galaxies constituting more straight filaments tend to have higher luminosity, more massive central black holes and higher star formation rate. Among the three properties, the central black hole mass is most strongly correlated with R L . It is also shown that the dark haloes constituting straight filaments tend to have similar masses. Our results suggest that the fuel-supply for central black holes and star formation of void galaxies occurs most efficiently along straight void filaments whose potential wells are generated by similar-mass dark haloes." ^[7]

List of void galaxies[link]

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References[link]

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