The Event Horizon Telescope has recently provided the first image of the dark shadow around the supermassive black hole M87∗. The observation of a highly circular shadow provides strong limits on deviations of M87∗'s quadrupole moment from the Kerr value. We show that the absence of such a deviation can be used to constrain the physics of extra dimensions of spacetime. Focusing on the Randall-Sundrum AdS5 brane-world scenario, we show that the observation of M87∗'s dark shadow sets the limit ℓ 170 AU, where ℓ is the AdS5 curvature radius. This limit is among the first quantitative constraints on exotic physics obtained from the extraordinary first ever image of the dark shadow of a black hole.
Hunting for extra dimensions in the shadow of M87∗
Visinelli L.
Writing – Original Draft Preparation
2019
Abstract
The Event Horizon Telescope has recently provided the first image of the dark shadow around the supermassive black hole M87∗. The observation of a highly circular shadow provides strong limits on deviations of M87∗'s quadrupole moment from the Kerr value. We show that the absence of such a deviation can be used to constrain the physics of extra dimensions of spacetime. Focusing on the Randall-Sundrum AdS5 brane-world scenario, we show that the observation of M87∗'s dark shadow sets the limit ℓ 170 AU, where ℓ is the AdS5 curvature radius. This limit is among the first quantitative constraints on exotic physics obtained from the extraordinary first ever image of the dark shadow of a black hole.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
