The Clowes–Campusano LQG (CCLQG; also called LQG 3 and U1.28) is a large quasar group">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 An active galactic nucleus (AGN) is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars. Such e ...

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 In physics, a redshift is an increase in the wavelength, and corresponding decrease in the frequency and photon energy, of electromagnetic radiation (such as light). The opposite change, a decrease in wavelength and increase in frequency and e ...

of 1.28, and is located in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The first constellati ...

of Leo. It was also notable because it is located in the

ecliptic The ecliptic or ecliptic plane is the orbital plane of Earth's orbit, Earth around the Sun. It was a central concept in a number of ancient sciences, providing the framework for key measurements in astronomy, astrology and calendar-making. Fr ...

, the line where the

Sun The Sun is the star at the centre of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light a ...

seems to travel in the entire year. It was 1.8 billion light-years away from the Huge-LQG, a group of 73 quasars discovered in 2012. Its proximity to the Huge-LQG has attracted the attention of scientists. First, because it was very close to the Huge-LQG, the region where the two LQG's are located are different, or "lumpy", when compared to other regions in the universe with the same size and redshift. Second, because of their close locations, it has been suggested that the two structures are really a single structure in itself, and only connected by hidden intergalactic filament; however, no such evidence has been found.

References

{{DEFAULTSORT:Clowes-Campusano LQG Leo (constellation) Galaxy filaments Quasars Large quasar groups Large-scale structure of the cosmos Astronomical objects discovered in 1991

Characteristics

See also

References