In astronomy and astrophysics, an ultraluminous X-ray source (ULX) is less luminous than an active galactic nucleus but more consistently luminous than...

1788. Its most notable features are its large stellar stream and ultraluminous X-ray source. NGC 5907 has an anomalously low metallicity and few detectable...

XMM-Newton an ultraluminous X-ray source, named NGC 5643 ULX1, located within 0.8 arcminutes from the nucleus. The source outshone the nucleus in X-rays and if...

bremsstrahlung from hot gas (0.5–1.5 keV). Ultraluminous X-ray sources (ULXs) are pointlike, nonnuclear X-ray sources with luminosities above the Eddington...

a very powerful ultraluminous X-ray source (ULX) discovered in the early 1980s by the Einstein Observatory and designated NGC 5204 X-1. It is located...

compact X-ray emitting accretor. Low-mass X-ray binaries (LMXBs) Soft X-ray transients (SXTs) Symbiotic X-ray binaries Super soft X-ray sources or Super...

Hyper-Luminous X-ray source 1, commonly known as HLX-1, is an intermediate-mass black hole candidate located in the lenticular galaxy ESO 243-49 about...

hardly left any trace of cold gas. In 2010, Chandra X-ray Observatory found an ultraluminous X-ray source (ULX). The ULX's position is in one of NGC 1399's...

illuminated when the nucleus of the galaxy hosted a quasar. An ultraluminous X-ray source has been observed 22 arcseconds from the nucleus of the galaxy...

Discrete Source Origin for the Highly Ionized Iron Emission from the Galactic Centre Region, 2002, Nature 415, 148 Ultraluminous X-ray Source 1E 0953.8+6918...

matter from its companion. It has also been suggested that some ultraluminous X-ray sources may be the accretion disks of intermediate-mass black holes....

Via observations by the Chandra X-ray Observatory, 27 X-ray point sources, of which 13 are ultraluminous X-ray sources (without counting the central one)...

Sky Survey. X-ray emission was detected from 10 of these candidates confirming their classification as IMBH. Some ultraluminous X-ray sources (ULXs) in...

which are regions of star formation. Holmberg II also hosts an ultraluminous X-ray source. One hypothesis suggests that is caused by an intermediate mass...

X-ray pulsars or accretion-powered pulsars are a class of astronomical objects that are X-ray sources displaying strict periodic variations in X-ray intensity...

revolves around its more massive companion every 2.5 days. M82 X-2 is an ultraluminous X-ray source (ULX), shining about 100 times brighter than theory suggests...

about 26 years. The accreting neutron star in this system is an ultraluminous X-ray Pulsar (ULXP) making it the second closest ULXP and the first ULXP...

Patruno, A.; Portegies Zwart, S.; Dewi, J.; Hopman, C. (2006). "The ultraluminous X-ray source in M82: an intermediate-mass black hole with a giant companion"...

because of its well defined spiral arms. Two supernovae and two ultraluminous X-ray sources have been discovered in NGC 7424. NGC 7424 is intermediate between...

and it contains an ultraluminous X-ray source with an emission of 1.2 × 1039 erg s−1, which is the most luminous source of X-rays in the Local Group of...

object) UltraLuminous InfraRed Galaxy, a galaxy that is brighter than 1012 solar luminosities in the infrared ULX – (celestial object) ultraluminous x-ray source...

Richard F. (20 March 2003). "Discovery of X-Ray Quasi-periodic Oscillations from an Ultraluminous X-Ray Source in M82: Evidence against Beaming". The Astrophysical...

Stephen; et al. (2013). "Puzzling accretion onto a black hole in the ultraluminous X-ray source M101 ULX-1". Nature. 503 (7477): 500–3. arXiv:1312.0337. Bibcode:2013Natur...

Andromeda galaxy as "a close cousin" to SS 433. High-mass X-ray binary Ultraluminous X-ray source Roman, Nancy G. (1987). "Identification of a constellation...

active galaxies, quasars can be strong X-ray sources. Radio-loud quasars can also produce X-rays and gamma rays by inverse Compton scattering of lower-energy...

In 2005 the Chandra X-ray Observatory announced its observation of an ultraluminous X-ray source (ULX) in M74, radiating more X-ray power than a neutron...

NGC 6240, also known as the Starfish Galaxy, is a nearby ultraluminous infrared galaxy (ULIRG) in the constellation Ophiuchus. It was discovered by French...

Feedback, Galaxies, Jets and Their Environments, Dark Matter, Ultraluminous X-ray Sources, and X-ray Binary Populations. Van Speybroeck intended to use his Chandra...

accretion onto stellar-mass black holes is one possible model for ultraluminous X-ray sources (ULXSs). For accreting black holes, not all the energy released...

age–metallicity relation in the Galactic disc. Ultraluminous X-ray sources (ULXs): What powers X-ray sources that are not associated with active galactic...