New super-bright X-ray source discovered in galaxy NGC 7090

ULXs (Ultraluminous X-ray source) - point X-ray sources in the sky. They are so bright that each of

they give more radiation than a million suns. They are less bright than active galactic nuclei, but more stable than any known stellar process. Although there have been numerous studies of ULXs, the nature of these sources is not fully understood.

There are usually one ULXs in galaxies. However, some of them contain many of these radiation sources. NGC 7090, located 31 million light years from Earth, is one such galaxy. Previous observations have shown that NGC 7090 has two highly volatile and temporal ULXs - NGC 7090 ULX1 and NGC 7090 ULX2.

Credit: Walton et al., 2020.

Based on observations made withSwift, in a new study, astronomers led by Dominic Walton of the University of Cambridge in the UK report the discovery of another ULXs in NGC 7090. The results are complemented by data from NASA's Nuclear Spectroscopic Telescopes (NuSTAR) and Chandra Space Telescopes, as well as from ESA's XMM-Newton satellite ...

NGC 7090 ULX3 has reached its peak luminosity. This is the latest addition to the short but rapidly growing population of transient ULXs. It turned out that until the recent transition to the ULX mode, the radiation source had a stable but low luminosity. NGC 7090 ULX3 has been active for over seven months.

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