RadioAstron reveals a spine-sheath jet structure in 3C 273
| العنوان: | RadioAstron reveals a spine-sheath jet structure in 3C 273 |
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| المؤلفون: | Gabriele Bruni, J. A. Zensus, P. G. Edwards, José L. Gómez, James M. Anderson, Alexander B. Pushkarev, Yu. Yu. Kovalev, Manel Perucho, Kirill Sokolovsky, Antonio Fuentes, Mikhail M. Lisakov, José-María Martí, Leonid I. Gurvits, Andrei Lobanov, L. Vega-García, Tuomas Savolainen |
| المساهمون: | European Commission, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Generalitat Valenciana, Junta de Andalucía, German Research Foundation, National Institute for Astrophysics, CSIC, Max Planck Institute for Radio Astronomy, Department of Electronics and Nanoengineering, Universidad de Valencia, Technical University of Berlin, CSIRO, RAS - P.N. Lebedev Physics Institute, Michigan State University, Aalto-yliopisto, Aalto University |
| المصدر: | Astronomy & Astrophysics, 654 Astronomy and Astrophysics Digital.CSIC. Repositorio Institucional del CSIC instname |
| بيانات النشر: | arXiv, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Astrophysics::High Energy Astrophysical Phenomena, Stratification (water), FOS: Physical sciences, Jets [Galaxies], Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Quasars: individual: 3C 273, 0103 physical sciences, Angular resolution, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Jet (fluid), Internal energy, 010308 nuclear & particles physics, Astronomy and Astrophysics, Quasar, Plasma, Galaxies: active, Astrophysics - Astrophysics of Galaxies, Active [Galaxies], Magnetic field, Flow velocity, Space and Planetary Science, Galaxies: jets, Astrophysics of Galaxies (astro-ph.GA), Astrophysics::Earth and Planetary Astrophysics, Individual: 3C 273 [Quasars] |
| الوصف: | We present Space-VLBI RadioAstron observations at 1.6 GHz and 4.8 GHz of the flat spectrum radio quasar 3C 273, with detections on baselines up to 4.5 and 3.3 Earth Diameters, respectively. Achieving the best angular resolution at 1.6 GHz to date, we have imaged limb-brightening in the jet, not previously detected in this source. In contrast, at 4.8 GHz, we detected emission from a central stream of plasma, with a spatial distribution complementary to the limb-brightened emission, indicating an origin in the spine of the jet. While a stratification across the jet width in the flow density, internal energy, magnetic field, or bulk flow velocity are usually invoked to explain the limb-brightening, the different jet structure detected at the two frequencies probably requires a stratification in the emitting electron energy distribution. Future dedicated numerical simulations will allow the determination of which combination of physical parameters are needed to reproduce the spine-sheath structure observed by Space-VLBI with RadioAstron in 3C 273. © ESO 2021. JLG and AF acknowledge financial support from the Spanish Ministerio de Economia y Competitividad (grants AYA2016-80889-P, PID2019-108995GB-C21), the Consejeria de Economia, Conocimiento, Empresas y Universidad of the Junta de Andalucia (grant P18-FR-1769), the Consejo Superior de Investigaciones Cientificas (grant 2019AEP112), and the State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa award for the Instituto de Astrofisica de Andalucia (SEV-2017-0709). APL, YYK, and ABP were supported by the Russian Science Foundation (project 20-62-46021). TS was partly supported by the Academy of Finland projects 274477 and 315721. MP acknowledges the support by the Spanish Ministerio de Ciencia e Innovacion (MICINN) under grant PID2019-105510GB-C31. MP and JMM acknowledge financial support from the Spanish Ministry of Science through Grants PID2019-107427GB-C33 and AYA2016-77237-C3-3-P, and from the Generalitat Valenciana through grant PROMETEU/2019/071. JMA was supported by the German Research Foundation grant HE5937/2-2. LIG acknowledges support by the CSIRO Distinguished Visitor Programme. The RadioAstron project is led by the Astro Space Center of the Lebedev Physical Institute of the Russian Academy of Sciences and the Lavochkin Scientific and Production Association under a contract with the Roscosmos State Corporation, in collaboration with partner organizations in Russia and other countries. This publication has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 730562 [RadioNet]. |
| وصف الملف: | application/pdf |
| تدمد: | 0004-6361 |
| DOI: | 10.48550/arxiv.2101.07324 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::227f3b4f3affebb348f7f1e34bb64cc4Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....227f3b4f3affebb348f7f1e34bb64cc4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00046361 |
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| DOI: | 10.48550/arxiv.2101.07324 |