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Quasar

Facts for Prelims (FFP)

 

Source: CNN

 Context: Astronomers have discovered the brightest object in the universe, a quasar powered by the fastest-growing black hole on record.

  • Initially mistaken for a star, the quasar, named J0529-4351, was found using the European Southern Observatory’s Very Large Telescope.
  • It is located over 12 billion light-years away and its black hole devours the equivalent of one sun per day, with a mass 17 billion times that of our sun.

  

Difference between Blazars and Quasars:

Characteristic Blazars Quasars
Orientation Jet observed almost end-on Jet observed at larger angles
Spectral Features Faster-than-light movements Broad optical lines, thermal spectra
Smooth energy distributions X-ray emission features
Luminosity varies on short timescales Luminosity varies over longer periods
Relativistic jet pointing towards Earth Angled view of the accretion disk

 

A quasar is a bright core of a distant galaxy that is powered by a supermassive black hole. Quasars are a subclass of active galactic nuclei (AGNs), which are extremely luminous galactic cores where gas and dust fall into a supermassive black hole. Quasars are also known as quasi-stellar objects, abbreviated QSO.