To Walk The Corridors Of Hell Comments

Cygnus X-1 was discovered as an X-ray source 30 years ago This binary system, distant of 2.5 kpc, consists of the O9.7 Iab type
Supergiant HDE 22 and a compact object orbiting around with a period of 5.6 days. The mass of the unseen companion, significantly
Larger then 5 solar masses, suggests that it is a black hole. Focused wind accretion from a primary star being extremely close to
Filling the Roche lobe drives the powerful source of the X-ray radiation. Cygnus X-1 is one of the brightest X-ray sources in the sky.
...
Read full text