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Komberg–Kravtsov–Lukash LQG 8
A large quasar group (LQG) is a collection of quasars (a form of supermassive black hole active galactic nucleus, active galactic nuclei) that form what are thought to constitute the largest astronomical structures in the observable universe. LQGs are thought to be precursors to the galaxy filament, sheets, walls and filaments of galaxies found in the relatively nearby universe. Prominent LQGs On January 11, 2013, the discovery of the Huge-LQG was announced by the University of Central Lancashire, as the largest known structure in the universe by that time. It is composed of 74 quasars and has a minimum diameter of 1.4 billion light-years, but over 4 billion light-years at its widest point. According to researcher and author, Roger Clowes, the existence of structures with the size of LQGs was believed theoretically impossible. Cosmological structures had been believed to have a size limit of approximately 1.2 billion light-years. List of LQGs Redshift, represented by "z," is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quasar
A quasar ( ) is an extremely Luminosity, luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by accretion onto a supermassive black hole with a mass ranging from millions to tens of billions of solar masses, surrounded by a gaseous Accretion disk, accretion disc. Gas in the disc falling towards the black hole heats up and releases energy in the form of electromagnetic radiation. The radiant energy of quasars is enormous; the most powerful quasars have luminosity, luminosities thousands of times greater than that of a galaxy such as the Milky Way. Quasars are usually categorized as a subclass of the more general category of AGN. The redshifts of quasars are of Expansion of the universe, cosmological origin. The term originated as a Contraction (grammar), contraction of "quasi-stellar ''[star-like]'' radio source"—because they were first identified during the 1950s as sources of radio-wave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clowes–Campusano LQG
University of Central Lancashire">UCLan'' --> The Clowes–Campusano LQG (CCLQG; also called LQG 3 and U1.28) is a large quasar group, consisting of 34 quasars and measuring about 2 billion light-years across. It is one of the List of largest known cosmic structures, largest known superstructures in the observable universe. It is located near the larger Huge-LQG. It was discovered by the astronomers Roger Clowes and Luis Campusano in 1991. Characteristics Lying at a distance of 9.5 billion light years away, the CCLQG is a cosmic decoupling of 34 individual quasars (highly luminous active galactic nuclei powered by supermassive black holes) spanning a region roughly 2 billion light-years in length, and about 1 billion light years wide, making it one of the largest and most exotic cosmic structures known in the observable universe. It was named U1.28 because of its average redshift of 1.28, and is located in the constellation of Leo. It was also notable because it is located in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Komberg–Kravtsov–Lukash LQG 8
A large quasar group (LQG) is a collection of quasars (a form of supermassive black hole active galactic nucleus, active galactic nuclei) that form what are thought to constitute the largest astronomical structures in the observable universe. LQGs are thought to be precursors to the galaxy filament, sheets, walls and filaments of galaxies found in the relatively nearby universe. Prominent LQGs On January 11, 2013, the discovery of the Huge-LQG was announced by the University of Central Lancashire, as the largest known structure in the universe by that time. It is composed of 74 quasars and has a minimum diameter of 1.4 billion light-years, but over 4 billion light-years at its widest point. According to researcher and author, Roger Clowes, the existence of structures with the size of LQGs was believed theoretically impossible. Cosmological structures had been believed to have a size limit of approximately 1.2 billion light-years. List of LQGs Redshift, represented by "z," is a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Komberg–Kravtsov–Lukash LQG 7
A large quasar group (LQG) is a collection of quasars (a form of supermassive black hole active galactic nuclei) that form what are thought to constitute the largest astronomical structures in the observable universe. LQGs are thought to be precursors to the sheets, walls and filaments of galaxies found in the relatively nearby universe. Prominent LQGs On January 11, 2013, the discovery of the Huge-LQG was announced by the University of Central Lancashire, as the largest known structure in the universe by that time. It is composed of 74 quasars and has a minimum diameter of 1.4 billion light-years, but over 4 billion light-years at its widest point. According to researcher and author, Roger Clowes, the existence of structures with the size of LQGs was believed theoretically impossible. Cosmological structures had been believed to have a size limit of approximately 1.2 billion light-years. List of LQGs Redshift, represented by "z," is a fundamental concept in astrophysics. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Komberg–Kravtsov–Lukash LQG 2
A large quasar group (LQG) is a collection of quasars (a form of supermassive black hole active galactic nuclei) that form what are thought to constitute the largest astronomical structures in the observable universe. LQGs are thought to be precursors to the sheets, walls and filaments of galaxies found in the relatively nearby universe. Prominent LQGs On January 11, 2013, the discovery of the Huge-LQG was announced by the University of Central Lancashire, as the largest known structure in the universe by that time. It is composed of 74 quasars and has a minimum diameter of 1.4 billion light-years, but over 4 billion light-years at its widest point. According to researcher and author, Roger Clowes, the existence of structures with the size of LQGs was believed theoretically impossible. Cosmological structures had been believed to have a size limit of approximately 1.2 billion light-years. List of LQGs Redshift, represented by "z," is a fundamental concept in astrophysics. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seyfert Galaxies
Seyfert galaxies are one of the two largest groups of active galactic nucleus, active galaxies, along with quasar host galaxies. They have quasar-like Active galactic nucleus, nuclei (very luminous sources of electromagnetic radiation that are outside of our own galaxy) with very high surface brightnesses whose spectrum, spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable. Seyfert galaxies account for about 10% of all galaxies and are some of the most intensely studied objects in astronomy, as they are thought to be powered by the same phenomena that occur in quasars, although they are closer and less luminous than quasars. These galaxies have supermassive black holes at their centers which are surrounded by accretion discs of in-falling material. The accretion discs are believed to be the source of the observed ultraviolet radiation. Ultraviolet Spectral line, emission and absorption lines provide the best diagnos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
