India, Nov. 2 -- The Government of India has issued a release:
Astronomers have divulged the mystery behind the changing X-ray behaviour of NGC 4490 ULX-8, one of the brightest X-Ray emitters located in a nearby galaxy, by tracking X-Ray observations over a 24-year period. This can help in understanding the compact objects that power the ULXs and also track the growth of these objects in such extreme environments.
Ultraluminous X-ray sources (ULXs) are among the brightest X-ray emitters in nearby galaxies, apart from the emission from supermassive black holes in their centres. ULXs are thought to host either neutron stars or black holes that draw in matter from a companion star. As this material falls inward, it heats up and emits intense...