تقرير
The X-Ray Polarization View of Mrk 421 in an Average Flux State as Observed By the Imaging X-Ray Polarimetry Explorer
| العنوان: | The X-Ray Polarization View of Mrk 421 in an Average Flux State as Observed By the Imaging X-Ray Polarimetry Explorer |
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| المؤلفون: | Laura Di Gesu, Immacolata Donnarumma, Fabrizio Tavecchio, Iván Agudo, Thibault Barnounin, Nicolò Cibrario, Niccolò Di Lalla, Alessandro Di Marco, Juan Escudero, Manel Errando, Svetlana G. Jorstad, Dawoon E. Kim, Pouya M. Kouch, Ioannis Liodakis, Elina Lindfors, Grzegorz Madejski, Herman L. Marshall, Alan P. Marscher, Riccardo Middei, Fabio Muleri, Ioannis Myserlis, Michela Negro, Nicola Omodei, Luigi Pacciani, Alessandro Paggi, Matteo Perri, Wayne H. Baumgartner, Stephen D. Bongiorno, Steven R. Ehlert, Jeffery J. Kolodziejczak, Stephen L. O’Dell, Brian D. Ramsey, Allyn F. Tennant, Nicolas E. Thomas, Martin C. Weisskopf |
| المصدر: | Astrophysical Journal Letters. 938(1) |
| بيانات النشر: | United States: NASA Center for Aerospace Information (CASI), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Astrophysics |
| الوصف: | Particle acceleration mechanisms in supermassive black hole jets, such as shock acceleration, magnetic reconnection, and turbulence, are expected to have observable signatures in the multiwavelength polarization properties of blazars. The recent launch of the Imaging X-Ray Polarimetry Explorer (IXPE) enables us, for the first time, to use polarization in the X-ray band (2–8 keV) to probe the properties of the jet synchrotron emission in high-synchrotron-peaked BL Lac objects (HSPs). We report the discovery of X-ray linear polarization (degree Πx = 15% ± 2% and electric vector position angle ψx = 35° ± 4°) from the jet of the HSP Mrk 421 in an average X-ray flux state. At the same time, the degree of polarization at optical, infrared, and millimeter wavelengths was found to be lower by at least a factor of 3. During the IXPE pointing, the X-ray flux of the source increased by a factor of 2.2, while the polarization behavior was consistent with no variability. The higher level of Πx compared to longer wavelengths, and the absence of significant polarization variability, suggest a shock is the most likely X-ray emission site in the jet of Mrk 421 during the observation. The multiwavelength polarization properties are consistent with an energy-stratified electron population, where the particles emitting at longer wavelengths are located farther from the acceleration site, where they experience a more disordered magnetic field. |
| نوع الوثيقة: | Report |
| اللغة: | English |
| تدمد: | 2041-8213 2041-8205 |
| DOI: | 10.3847/2041-8213/ac913a |
| الوصول الحر: | https://ntrs.nasa.gov/citations/20220013989Test |
| ملاحظات: | 976348.01.10 NASA NNM15AA18C ASI-OHBI-2017-12-I.0 ASI-INAF-2017-12-H0 ASI-INFN-2017.13-H0 AYA2016-80889-P PID2019-107847RB-C44 Academy of Finland 317636 Academy of Finland 320045 NSF AST-2108622 NASA 80NSSC21K1917 NASA 80NSSC22K0537 |
| رقم الانضمام: | edsnas.20220013989 |
| قاعدة البيانات: | NASA Technical Reports |
Full Text Finder | تدمد: | 20418213 20418205 |
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| DOI: | 10.3847/2041-8213/ac913a |