CrackitToday App

Cygnus X-1

Cygnus X-1:

Astro Sat, India’s first, dedicated multi-wavelength astronomy mission, accomplished the difficult task of measuring the X-ray polarisation of the Cygnus X-1 black hole system

  • Cygnus X-1 was discovered over four decades ago.
  • It is one of the first confirmed black hole systems in our galaxy.
  • The black hole in Cygnus X-1 is 20 times heavier than the Sun, and has a companion  a heavy supergiant star (40 times more massive than the Sun) in a binary system.
  • It is located at a distance that is about 400 times more than the distance between Earth and Sun.
  • Due to the gravitational pull of the black hole, material from the supergiant falls and spirals in towards the black hole.
  • This process leads to the formation of a thin accretion disk which is responsible for soft X-rays.