Speaker
Description
Accreting stellar-mass black holes in X-ray binaries (XRBs) can be found in
different states that are characterized by different spectral properties.
The two basic states are high/soft and low/hard states in which either the
thermal multi-colour black-body component originating in the accretion disc or
non-thermal power-law like Comptonisation component originating in the hot
corona dominates.
The NASA Imaging X-ray Polarimetry Explorer (IXPE) mission has recently observed
one of the brightest persistent XRB, Cyg X-1, in its low/hard state. The 242ks
observation of polarization properties of this source in 2-8keV energy band
resulted in highly significant measurement of linear polarization. In this talk
I will summarize this observational result and discuss its implications for
the models of X-ray emission from this source.
| I am registered. to the conference | Yes |
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