For the 2010 action-adventure video game, see ProtoGalaxy.
In physical cosmology, a protogalaxy, which could also be called a "primeval galaxy", is a cloud of gas which is forming into a galaxy. It is believed that the rate of star formation during this period of galactic evolution will determine whether a galaxy is a spiral or elliptical galaxy; a slower star formation tends to produce a spiral galaxy. The smaller clumps of gas in a protogalaxy form into stars.
The term "protogalaxy" itself is generally accepted to mean "Progenitors of the present day (normal) galaxies, in the early stages of formation." However, the "early stages of formation" is not a clearly defined phrase. It could be defined as: "The first major burst of star formation in a progenitor of a present day elliptical galaxy"; "The peak merging epoch of dark halos of the fragments which assemble to produce an average galaxy today"; "A still gaseous body before any star formation has taken place."; or " an over-dense region of dark matter in the very early universe, destined to become gravitationally bound and to collapse."[1]
^Djorgovski, S.G. (2001). Encyclopedia of Astronomy and Astrophysics. Vol. 3 (1st ed.). Dirac House, Temple Back, Bristol: Institute of Physics Publishing, Nature Publishing Group. pp. 2159–2165. ISBN 978-0-333-75088-9.
In physical cosmology, a protogalaxy, which could also be called a "primeval galaxy", is a cloud of gas which is forming into a galaxy. It is believed...
ProtoGalaxy is a cross-genre video game for Microsoft Windows that was released on October 6, 2010. In the game's back-story, a species of powerful, unknown...
structure formation. The categories are set with respect to the size of a protogalaxy (an object that later evolves into a dwarf galaxy): Dark matter particles...
The existence of galaxies so soon after the Big Bang suggests that protogalaxies must have grown in the so-called "dark ages". The detailed process by...
Ring Irregular By size Brightest cluster Giant elliptical Dwarf By type Protogalaxy Starburst Dark Active Radio Seyfert Quasar Microquasar Blazar OVV Red...
galaxies in the foreground plane – nearly mature galaxies from 5 to 9 billion years ago – protogalaxies, blazing with young stars, beyond 9 billion years....
Comic Jumper: The Adventures of Captain Smiley XBLA Cut the Rope iOS ProtoGalaxy Win October 7 Sonic the Hedgehog 4: Episode 1 iOS Kingdom Hearts Re:coded...
Robert (December 1967). "Thermal Cosmic Radiation and the Formation of Protogalaxies". Proceedings of the National Academy of Sciences. 58 (6): 2179–2186...
as mentioned before, conditions are favorable. This holds true for protogalaxies, or galaxies just throughout to be forming, and old galaxies that have...
They are the smaller form of protoclusters. These contain galaxies and protogalaxies embedded in dark matter haloes that are in the process of fusing into...
about 120 light-years (37 pc) across. ` UDFj-39546284 is a candidate protogalaxy located in Fornax, although recent analyses have suggested it is likely...
UDFy-33436598 zp≅8.6 13.317 Candidate galaxy or protogalaxy UDFy-38135539 zp≅8.6 13.317 Candidate galaxy or protogalaxy A spectroscopic redshift of z = 8.55 was...
Lyman-alpha blob (a massive concentration of hydrogen gas believed to be a protogalaxy) that was discovered in 2009. Massing close to 40 billion suns and located...
forms. 300 million years: First large-scale astronomical objects, protogalaxies and quasars may have begun forming. As Population III stars continue...
closed or open. Her galaxy models led to the first approximation of what protogalaxies should look like. In 1974 she received the American Astronomical Society's...
galaxy Faint blue galaxy Galaxy color–magnitude diagram Illustris project Protogalaxy Metallicity § Stars Cosmos Redshift 7 Large quasar group § List of LQGs...
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