Search Publications
Polarized x-rays constrain the disk-jet geometry in the black hole x-ray binary Cygnus X-1
Ingram, Adam; Wu, Kinwah; Enoto, Teruaki +111 more
A black hole x-ray binary (XRB) system forms when gas is stripped from a normal star and accretes onto a black hole, which heats the gas sufficiently to emit x-rays. We report a polarimetric observation of the XRB Cygnus X-1 using the Imaging X-ray Polarimetry Explorer. The electric field position angle aligns with the outflowing jet, indicating t…
Black hole spin–orbit misalignment in the x-ray binary MAXI J1820+070
Jonker, Peter G.; Piirola, Vilppu; Tsygankov, Sergey S. +10 more
The observational signatures of black holes in x-ray binary systems depend on their masses, spins, accretion rate, and the misalignment angle between the black hole spin and the orbital angular momentum. We present optical polarimetric observations of the black hole x-ray binary MAXI J1820+070, from which we constrain the position angle of the bin…