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SUMMARY:Finding the valid gravity theory from observations of black hole s
 ilhouettes
DTSTART;VALUE=DATE-TIME:20241023T064000Z
DTEND;VALUE=DATE-TIME:20241023T070000Z
DTSTAMP;VALUE=DATE-TIME:20260916T191921Z
UID:indico-contribution-4160@cern.ch
DESCRIPTION:Speakers: Vyacheslav Dokuchaev (Institute for Nuclear Research
  of the Russian Academy of Sciences)\nNowadays the major problem in cosmol
 ogy is in the choice of the valid gravity theory for interpretation of the
  observational data. Usually in cosmology it is used the Einstein general 
 theory of relativity and the corresponding Friedman-Robertson-Walker equat
 ions in the strong field limit (when gravitational potential is of the ord
 er of square of the light velocity). Meanwhile\, the general theory of rel
 ativity is verified and confirmed only in the weak field limit in the near
 est cosmological environments. Observations of black hole images (silhouet
 tes) opens a unique possibility for the verification (or falsification) of
  modified gravity theories in the strong field limit when gravitation domi
 nates over astrophysical or cosmological factors. This is especially cruci
 al for physical interpretation of astrophysical and cosmological observati
 ons of the far regions of the Universe and for understanding the physical 
 origin of enigmatic dark matter and dark energy. The first visual images o
 f supermassive black holes M87* and SgrA* have been observed recently by t
 he Event Horizon Telescope. These images demonstrate a qualitative agreeme
 nt with the general theory of relativity.  In the nearest future it would 
 be possible to quantitatively scrutinize the known modified gravity theori
 es after construction of the Space Millimetron Observatory with nano-arcse
 cond angular resolution.\n\nhttps://indico.particle.mephi.ru/event/436/con
 tributions/4160/
LOCATION: Moskvorechye 1
URL:https://indico.particle.mephi.ru/event/436/contributions/4160/
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