Article ; Online: Polarized x-rays from a magnetar.
2022 Volume 378, Issue 6620, Page(s) 646–650
Abstract: Magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. Polarization measurements could provide information on their magnetic fields and surface properties. We observed polarized x-rays from the magnetar 4U 0142+61 ... ...
| Abstract | Magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. Polarization measurements could provide information on their magnetic fields and surface properties. We observed polarized x-rays from the magnetar 4U 0142+61 using the Imaging X-ray Polarimetry Explorer and found a linear polarization degree of 13.5 ± 0.8% averaged over the 2- to 8-kilo-electron volt band. The polarization changes with energy: The degree is 15.0 ± 1.0% at 2 to 4 kilo-electron volts, drops below the instrumental sensitivity ~4 to 5 kilo-electron volts, and rises to 35.2 ± 7.1% at 5.5 to 8 kilo-electron volts. The polarization angle also changes by 90° at ~4 to 5 kilo-electron volts. These results are consistent with a model in which thermal radiation from the magnetar surface is reprocessed by scattering off charged particles in the magnetosphere. |
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| Language | English | ||||||||||
| Publishing date | 2022-11-03 | ||||||||||
| Publishing country | United States | ||||||||||
| Document type | Journal Article ; Research Support, Non-U.S. Gov't ; 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.add0080 | ||||||||||
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| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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