Discovery of a lone black hole in the Milky Way galaxy;Prof. Dr. Sedigheh Sajjadian, a faculty member of Isfahan University of Technology, and Dr. Sohrab Rahvar, a professor at Sharif University of Technology (SUT), are two eminent scientist participants in this discovery in the new era of cosmological research. 

Convergence and micro-convergence‌ gravity types are the most successful predictions of the theory of general relativity, proposed by Albert Einstein in 1915. In this phenomenon, the presence of heavy objects in the background is detected by the amplification of the light of the background stars.

In gravitational micro-convergence events, due to the small distance between the images, they are not seen separately, but the total light of the images is received, which is amplified in proportion to the star's source. Astronomers use this phenomenon as an accurate observational tool to understand the universe and observe the depths of the skies.

An international research team consisting of 50 research institutes with the participation of two Iranian researchers, Dr. Sedigheh Sajjadian, a faculty member of the Department of Physics from IUT, and Dr. Sohrab Rahvar, a faculty member of the Department of Physics from SUT, discovered a lone black hole in the Milky Way galaxy.

Dr. Sedigheh Sajjadian who was in charge of the data collected by the Danish Telescope from this event said that these observations were made for 6 years by many telescopes around the world, including the Hubble Space Telescope.

The results of this study, which were sent to the prestigious journal of “The Astrophysical Journal” are available on https://arxiv.org/pdf/2201.13296.pdf and also on https: // www. sciencealert.com/for-the-first-time-a-lone-black-hole-has-be.