RadioAstron reveals a spine-sheath jet structure in 3C 273

被引：21

作者：

Bruni, G. ^{[1
]}

Gomez, J. L. ^{[2
]}

Vega-Garcia, L. ^{[3
]}

Lobanov, A. P. ^{[3
]}

Fuentes, A. ^{[2
]}

Savolainen, T. ^{[3
,4
,5
]}

Kovalev, Y. Y. ^{[3
,6
,7
]}

Perucho, M. ^{[8
,9
]}

Marti, J. -m. ^{[8
,9
]}

Anderson, J. M. ^{[10
,11
]}

Edwards, P. G. ^{[12
]}

Gurvits, L. I. ^{[12
,13
,14
]}

Lisakov, M. M. ^{[3
,6
]}

Pushkarev, A. B. ^{[6
,15
]}

Sokolovsky, K. V. ^{[16
,17
]}

Zensus, J. A. ^{[3
]}

机构：

[1] INAF Ist Astrofis & Planetol Spaziali, Via Fosso del Cavaliere 100, I-00133 Rome, Italy

[2] CSIC, IAA Inst Astrofis Andalucia, Glorieta Astron S-N, Granada 18008, Spain

[3] MPIfR Max Planck Inst Radio Astron, Hugel 69, D-53121 Bonn, Germany

[4] Aalto Univ, Metsahovi Radio Observ, Metsahovintie 114, Kylmala 02540, Finland

[5] Aalto Univ, Dept Elect & Nanoengn, PL 15500, Aalto 00076, Finland

[6] Russian Acad Sci, Lebedev Phys Inst, Leninsky Prospekt 53, Moscow 119991, Russia

[7] Moscow Inst Phys & Technol, Inst Sky Per 9, Dolgoprudnyi 141700, Moscow Region, Russia

[8] Univ Valencia, Dept Astron & Astrofis, C Dr Moliner 50, Valencia 46100, Spain

[9] Univ Valencia, Observ Astron, C Catedrat Jose Beltran 2, Valencia 46980, Spain

[10] Tech Univ Berlin, Inst Geodasie & Geoinformat Tech, Fak 6, Sekr KAI 2-2,Kaiserin Augusta Allee 104-106, D-10553 Berlin, Germany

[11] GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany

[12] CSIRO Astron & Space Sci, POB 76, Epping, NSW 1710, Australia

[13] JIVE Joint Inst VLBI ERIC, Oude Hoogeveensedijk 4, NL-7991 PD Dwingekoo, Netherlands

[14] Delft Univ Technol, Dept Astrodynam & Space Missions, Kluyverweg 1, NL-2629 HS Delft, Netherlands

[15] Crimean Astrophys Observ, Nauchny 298409, Crimea, Russia

[16] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[17] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Univ Skii Pr 13, Moscow 119992, Russia

来源：

ASTRONOMY & ASTROPHYSICS | 2021年 / 654卷 / 654期

基金：

俄罗斯科学基金会; 芬兰科学院;

关键词：

galaxies; active; jets; quasars; individual; 3C; 273; ACTIVE GALACTIC NUCLEI; PARSEC-SCALE JET; INTERNAL STRUCTURE; RADIO-SOURCES; KINEMATICS; ENERGY; MODEL; CORE; VARIABILITY; PARAMETERS;

D O I：

10.1051/0004-6361/202039423

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：9

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