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Black hole accretion disk xray1/2/2023 ![]() ![]() The EHT project includes theoretical and simulation studies that are framing questions rooted at the black hole boundary that may soon be answered through observations.īy linking together existing telescopes using novel systems, the EHT leverages considerable global investment to create a fundamentally new instrument with an angular resolving power that is the highest possible from the surface of the Earth. Addition of key millimeter and submillimeter wavelength facilities at high altitude sites has now opened the possibility of imaging such features and sensing the dynamic evolution of black hole accretion. In both cases, the sizes match that of the predicted silhouette caused by the extreme lensing of light by the black hole. ![]() This technique of linking radio dishes across the globe to create an Earth-sized interferometer, has been used to measure the size of the emission regions of the two supermassive black holes with the largest apparent event horizons: SgrA* (Sagittarius A*) at the center of the Milky Way and M87 (Messier 87) in the center of the Virgo A galaxy. The EHT (Event Horizon Telescope) is an international collaboration that has formed to continue the steady long-term progress on improving the capability of VLBI (Very Long Baseline Interferometry) at short wavelengths in pursuit of this goal. This capability would open a new window on the study of general relativity in the strong field regime, accretion and outflow processes at the edge of a black hole, the existence of event horizons, and fundamental black hole physics. Such observations could lead to images of strong gravity effects that are expected near a black hole, and to the direct detection of dynamics near the black hole as matter orbits at near light speeds. Astronomy and Telescopes Black Hole and its Shadow - first direct visual evidence of a supermassive black holeįirst Image of a Black Hole Some context on Black Holes Einsteins Theory Tested Status ReferencesĪ long standing goal in astrophysics is to directly observe the immediate environment of a black hole with an angular resolution comparable to the event horizon. ![]()
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