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X-ray quasi-periodic eruptions from two previously quiescent galaxies

Gromadzki, M.; Salvato, M.; Buchner, J. +21 more

Quasi-periodic eruptions (QPEs) are very-high-amplitude bursts of X-ray radiation recurring every few hours and originating near the central supermassive black holes of galactic nuclei^1,2. It is currently unknown what triggers these events, how long they last and how they are connected to the physical properties of the inner accretion f…

Light bending and X-ray echoes from behind a supermassive black hole

Brandt, W. N.; Costantini, E.; Blandford, R. D. +2 more

The innermost regions of accretion disks around black holes are strongly irradiated by X-rays that are emitted from a highly variable, compact corona, in the immediate vicinity of the black hole^1-3. The X-rays that are seen reflected from the disk⁴, and the time delays, as variations in the X-ray emission echo or `reverberate…

Jets from MRC 0600-399 bent by magnetic fields in the cluster Abell 3376

Nakanishi, Hiroyuki; Akamatsu, Hiroki; Takeuchi, Tsutomu T. +7 more

Galaxy clusters are known to harbour magnetic fields, the nature of which remains unresolved. Intra-cluster magnetic fields can be observed at the density contact discontinuity formed by cool and dense plasma running into hot ambient plasma^1,2, and the discontinuity exists³ near the second-brightest galaxy⁴, MRC 06…