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Optical circular polarization of blazar S4 0954+65 during high linear polarized states
| Indexado |
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| DOI | 10.1051/0004-6361/202348214 | ||||
| Año | 2023 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Abstract
Optical circular polarization observations can directly test the particle composition in black hole jets. We report the first observations of the BL Lac-type object S4 0954+65 in high linear polarized states. While no circular polarization was detected, we were able to place upper limits of <0.5% at 99.7% confidence. Using a simple model and our novel optical circular polarization observations, we can constrain the allowed parameter space for the magnetic field strength and composition of the emitting particles. Our results favor models that require magnetic field strengths of only a few Gauss and models in which the jet composition is dominated by electron-positron pairs. We discuss our findings in the context of typical magnetic field strength requirements for blazar emission models.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Liodakis, I. | Hombre |
Turun yliopisto - Finlandia
NASA Marshall Space Flight Center - Estados Unidos Univ Turku - Finlandia NASA Marshall Space Flight Ctr - Estados Unidos |
| 2 | Shablovinskaia, E. | - |
Special Astrophysical Observatory, Russian Academy of Sciences - Rusia
Universidad Diego Portales - Chile Russian Acad Sci - Rusia |
| 3 | Blinov, D. | Hombre |
Foundation for Research and Technology-Hellas - Grecia
University of Crete - Grecia Fdn Res & Technol Hellas - Grecia Univ Crete - Grecia |
| 4 | Savchenko, S. S. | Hombre |
Special Astrophysical Observatory, Russian Academy of Sciences - Rusia
Saint Petersburg State University - Rusia Pulkovo Observatory of the Russian Academy of Sciences - Rusia Russian Acad Sci - Rusia St Petersburg State Univ - Rusia Pulkovo Observ - Rusia |
| 5 | Malygin, E. | - |
Special Astrophysical Observatory, Russian Academy of Sciences - Rusia
Russian Acad Sci - Rusia |
| 6 | Kotov, S. | - |
Special Astrophysical Observatory, Russian Academy of Sciences - Rusia
Russian Acad Sci - Rusia |
| 7 | Kiehlmann, S. | Hombre |
Foundation for Research and Technology-Hellas - Grecia
University of Crete - Grecia Fdn Res & Technol Hellas - Grecia Univ Crete - Grecia |
| 8 | Readhead, Anthony C. S. S. | Hombre |
California Institute of Technology - Estados Unidos
CALTECH - Estados Unidos |
| 9 | Potter, S. B. | - |
South African Astronomical Observatory - República de Sudáfrica
University of Johannesburg - República de Sudáfrica South African Astron Observ - República de Sudáfrica Univ Johannesburg - República de Sudáfrica |
| 10 | Rieger, F. M. | - |
Institut fur Theoretische Physik Heidelberg - Alemania
Max Planck Institute for Plasma Physics - Alemania Heidelberg Univ - Alemania Max Planck Inst Plasma Phys - Alemania |
| 11 | Grishina, T. S. | - |
St Petersburg State Univ - Rusia
Saint Petersburg State University - Rusia |
| 12 | Hagen-Thorn, V. A. | - |
Saint Petersburg State University - Rusia
St Petersburg State Univ - Rusia |
| 13 | Kopatskaya, Evgenia N. | Mujer |
Saint Petersburg State University - Rusia
St Petersburg State Univ - Rusia |
| 14 | Larionova, Elena G. | Mujer |
Saint Petersburg State University - Rusia
St Petersburg State Univ - Rusia |
| 15 | Morozova, D. A. | - |
Saint Petersburg State University - Rusia
St Petersburg State Univ - Rusia |
| 16 | Troitskiy, I. S. | - |
Saint Petersburg State University - Rusia
St Petersburg State Univ - Rusia |
| 16 | Grishina, T. S. | - |
Saint Petersburg State University - Rusia
St Petersburg State Univ - Rusia |
| 17 | Troitskaya, Y. V. | - |
Saint Petersburg State University - Rusia
St Petersburg State Univ - Rusia |
| 18 | Vasilyev, Andrey A. | Hombre |
Saint Petersburg State University - Rusia
St Petersburg State Univ - Rusia |
| 19 | Papitto, A. | Hombre |
Crimean Astrophys Observ RAS - Rusia
|
| 20 | Borman, George A. | Hombre |
Crimean Astrophys Observ RAS - Rusia
|
| Fuente |
|---|
| National Science Foundation |
| NSF |
| European Research Council |
| NASA |
| National Aeronautics and Space Administration |
| Horizon 2020 |
| California Institute of Technology |
| European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme |
| Ministry of Education and Science of the Russian Federation |
| Marshall Space Flight Center |
| Max-Planck-Institut fur Astronomie |
| Oak Ridge Associated Universities |
| Fermi Guest Investigator Program |
| NASA through the Fermi Guest Investigator Program |
| Agencia Nacional de Investigación y Desarrollo |
| Ministry of Science and Higher Education of the Russian Federation |
| VLBA-BU |
| ANID Basal Project |
| Max Planck Institute for Radio Astronomy |
| Gemini ANID |
| NASA Postdoctoral Program at the Marshall Space Flight Center |
| Agradecimiento |
|---|
| We thank the anonymous referee for comments that helped improve this work. We also thank Svetlana Jorstad for providing the estimates of the inner jet position angles at the time of our observations through the BEAM-ME program. I. Liodakis was supported by the NASA Postdoctoral Program at the Marshall Space Flight Center, administered by Oak Ridge Associated Universities under contract with NASA. This research has made use of data from the OVRO 40-m monitoring program (Richards et al. 2011), supported by private funding from the California Institute of Technology and the Max Planck Institute for Radio Astronomy, and by NASA grants NNX08AW31G, NNX11A043G, and NNX14AQ89G and NSF grants AST-0808050 and AST-1109911. S. Kiehlmann acknowledges support from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme under grant agreement No. 771282. E.S. Shablovinskaya acknowledges support from ANID BASAL project FB210003 and Gemini ANID ASTRO21-0003. Observations with the SAO RAS telescopes are supported by the Ministry of Science and Higher Education of the Russian Federation. The renovation of telescope equipment is currently provided within the national project “Science and Universities”. E. S. Shablovinskaya, E. A. Malygin and S. S. Kotov obtained observational data on the unique scientific facility “Big Telescope Alt-azimuthal” of SAO RAS as well as made data processing with the financial support of grant No 075-15-2022-262 (13.MNPMU.21.0003) of the Ministry of Science and Higher Education of the Russian Federation. This study makes use of VLBA data from the VLBA-BU Blazar Monitoring Program (BEAM-ME and VLBA-BU-BLAZAR; http://www.bu.edu/blazars/BEAM-ME.html ), funded by NASA through the Fermi Guest Investigator Program. The VLBA is an instrument of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated by Associated Universities, Inc. |
| We thank the anonymous referee for comments that helped improve this work. We also thank Svetlana Jorstad for providing the estimates of the inner jet position angles at the time of our observations through the BEAMME program. I. Liodakis was supported by the NASA Postdoctoral Program at the Marshall Space Flight Center, administered by Oak Ridge Associated Universities under contract with NASA. This research has made use of data from the OVRO 40-m monitoring program (Richards et al. 2011), supported by private funding from the California Institute of Technology and the Max Planck Institute for Radio Astronomy, and by NASA grants NNX08AW31G, NNX11A043G, and NNX14AQ89G and NSF grants AST-0808050 and AST1109911. S. Kiehlmann acknowledges support from the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation programme under grant agreement No. 771282. E.S. Shablovinskaya acknowledges support from ANID BASAL project FB210003 and Gemini ANID ASTRO21-0003. Observations with the SAO RAS telescopes are supported by the Ministry of Science and Higher Education of the Russian Federation. The renovation of telescope equipment is currently provided within the national project "Science and Universities". E. S. Shablovinskaya, E. A. Malygin and S. S. Kotov obtained observational data on the unique scientific facility "Big Telescope Alt-azimuthal" of SAO RAS as well as made data processing with the financial support of grant No 075-15-2022-262 (13.MNPMU.21.0003) of the Ministry of Science and Higher Education of the Russian Federation. This study makes use of VLBA data from the VLBA-BU Blazar Monitoring Program (BEAM-ME and VLBA-BU-BLAZAR; http://www.bu.edu/blazars/BEAM-ME.html), funded by NASA through the Fermi Guest Investigator Program. The VLBA is an instrument of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated by Associated Universities, Inc. |
