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Active Galactic Nuclei

Kumari Sonali

Active Galactic Nuclei:

Astronomers from the Russian Academy of Sciences, using the Spektr-RG (SRG) space observatory, have detected 11 new Active Galactic Nuclei (AGNs) during their all-sky X-ray surveys.

  • Active Galactic Nuclei (AGNs) are compact regions at the centers of galaxies that emit exceptionally high levels of electromagnetic radiation, often outshining the rest of the galaxy.
  • This intense emission arises from either accretion of matter by a supermassive black hole or intense star formation activity.
  • AGNs are among the most luminous and persistent energy sources in the universe and are critical to understanding galaxy formation and evolution.
  • The newly detected AGNs were identified during an optical and X-ray inspection of sources listed in the ARTSS1-5 catalog, using SRG’s ART-XC telescope.
  • The team has also previously identified more than 50 AGNs and several cataclysmic variable stars.
  • All 11 AGNs are located at redshifts ranging from 0.028 to 0.258, indicating they are relatively nearby in cosmic terms.
  • Their X-ray luminosities fall within the typical range of 2 to 300 × 10³⁹ erg/s, which is consistent with known AGN profiles.

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