Article ; Online: Polarized x-rays constrain the disk-jet geometry in the black hole x-ray binary Cygnus X-1.
2022 Volume 378, Issue 6620, Page(s) 650–654
Abstract: 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 ... ...
| Abstract | 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 that the jet is launched from the inner x-ray-emitting region. The polarization degree is 4.01 ± 0.20% at 2 to 8 kiloelectronvolts, implying that the accretion disk is viewed closer to edge-on than the binary orbit. These observations reveal that hot x-ray-emitting plasma is spatially extended in a plane perpendicular to, not parallel to, the jet axis. |
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| Language | English | ||||||||||
| Publishing date | 2022-11-03 | ||||||||||
| Publishing country | United States | ||||||||||
| Document type | Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. | ||||||||||
| ZDB-ID | 128410-1 | ||||||||||
| ISSN | 1095-9203 ; 0036-8075 | ||||||||||
| ISSN (online) | 1095-9203 | ||||||||||
| ISSN | 0036-8075 | ||||||||||
| DOI | 10.1126/science.add5399 | ||||||||||
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| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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