Tidal disruption events and quasi periodic eruptions

Abstract

Tidal disruption events (TDEs) occur when a star passes close to a massive black hole, so that the tidal forces of the black hole exceed the binding energy of a star and cause it to be ripped apart. Part of the matter will fall onto the black hole, causing a strong increase in the luminosity. Such events are often seen in the optical or the X-ray (or both) or even at other wavelengths such as in the radio, where the diversity of observed emission is still poorly understood. The XMM-Newton catalogue of approximately a million X-ray detections covering 1283${}^2$ degrees of sky contains a number of these events. Here I will show the diverse nature of a number of TDEs discovered in the catalogue and discuss their relationship with quasi periodic eruptions.

7 pages, 1 figure, accepted version for the proceedings of the 'Black Hole Accretion Under the X-ray Microscope' Meeting held at ESAC in June 2022. Publisher : Astronomische Nachrichten

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• SN 2022jli: The ultraluminous birth of a low-mass X-ray binary
• Irregular Repeating Tidal Disruption Events due to Diffusive Tides