Volume 141, Number 5, March 2023
|Number of page(s)||4|
|Section||Gravitation, cosmology and astrophysics|
|Published online||06 March 2023|
Testing the black hole area law with Event Horizon Telescope
National Astronomical Observatories, Chinese Academy of Sciences - Beijing, 100012, China
(a) E-mail: email@example.com (corresponding author)
Received: 24 December 2022
Accepted: 22 February 2023
Hawking's black hole area theorem can be tested by monitoring the evolution of a single black hole over time. Using current imaging observations of two supermassive black holes M87* and Sgr A* from the Event Horizon Telescope (EHT), we find their horizon area variation fractions are consistent with the prediction of the black hole area law at the confidence level. We point out that whether the black hole area law is valid or not could be determined by future high-precision EHT observations of Sgr A*.
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