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A likely decade-long sustained tidal disruption event

Ramirez-Ruiz, Enrico; Gwyn, Stephen D. J.; Komossa, S. +11 more

Multiwavelength flares from tidal disruption and accretion of stars can be used to find and study otherwise dormant massive black holes in galactic nuclei ¹ . Previous well-monitored candidate flares were short-lived, with most emission confined to within ∼1 year ^2-5 . Here we report the discovery of a well-observed super-lon…

Millimetre-wave emission from an intermediate-mass black hole candidate in the Milky Way

Oka, Tomoharu; Tsujimoto, Shiho; Iwata, Yuhei +2 more

It is widely accepted that black holes with masses greater than a million solar masses (M_⊙) lurk at the centres of massive galaxies. The origins of such `supermassive' black holes (SMBHs) remain unknown¹, although those of stellar-mass black holes are well understood. One possible scenario is that intermediate-mass black hole…

The independent pulsations of Jupiter's northern and southern X-ray auroras

Coates, A. J.; Jackman, C. M.; Jones, G. H. +14 more

Auroral hot spots are observed across the Universe at different scales¹ and mark the coupling between a surrounding plasma environment and an atmosphere. Within our own Solar System, Jupiter possesses the only resolvable example of this large-scale energy transfer. Jupiter's northern X-ray aurora is concentrated into a hot spot, which i…