The hypersoft state of Cygnus X-3 - A key to jet quenching in X-ray binaries?

Understand

Cygnus X-3 is a unique microquasar in the Galaxy hosting a Wolf-Rayet companion orbiting a compact object that most likely is a low-mass black hole.

• The unique source properties are likely due to the interaction of the compact object with the heavy stellar wind of the companion.
• In this paper, we concentrate on a very specific period of time prior to the massive outbursts observed from the source.
• During this period, Cygnus X-3 is in a so-called hypersoft state, where the radio and hard X-ray fluxes are found to be at their lowest values (or non-detected), the soft X-ray flux is at its highest values, and sporadic gamma-ray emission is observed.