Sökning: id:"swepub:oai:research.chalmers.se:96413d9c-3d16-432b-95be-82fb931cddf2" >
Imaging and Variabi...
Imaging and Variability Studies of CTA 102 during the 2016 January γ-ray Flare
-
- Li, X. F. (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences,Chinese Academy of Sciences,ShanghaiTech University
-
- Mohan, P. (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
-
- An, T. (författare)
- Chinese Academy of Sciences,Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
-
visa fler...
-
- Hong, X. Y. (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences,Chinese Academy of Sciences,ShanghaiTech University
-
- Cheng, X. P. (författare)
- Chinese Academy of Sciences,Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
-
- Yang, Jun, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Zhang, Y. K. (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences,Chinese Academy of Sciences
-
- Zhang, Z. L. (författare)
- Chinese Academy of Sciences,Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
-
- Zhao, Wei (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences,Chinese Academy of Sciences
-
visa färre...
-
Shanghai Astronomical Observatory Chinese Academy of Sciences Chinese Academy of Sciences (creator_code:org_t)
- 2018-02-07
- 2018
- Engelska.
-
Ingår i: Astrophysical Journal. - : American Astronomical Society. - 1538-4357 .- 0004-637X. ; 854:1
- Relaterad länk:
-
https://iopscience.i...
-
visa fler...
-
https://research.cha...
-
https://doi.org/10.3...
-
visa färre...
Abstract
Ämnesord
Stäng
- The γ-ray-bright blazar CTA 102 is studied using imaging (new 15 GHz and archival 43 GHz Very Long Baseline Array, VLBA data) and time variable optical flux density, polarization degree, and electric vector position angle (EVPA) spanning between 2015 June 1 and 2016 October 1, covering a prominent γ-ray flare during 2016 January. The pc-scale jet indicates expansion with oscillatory features up to 17 mas. Component proper motions are in the range 0.04-0.33 mas yr -1 with acceleration up to 1.2 mas followed by a slowing down beyond 1.5 mas. A jet bulk Lorentz factor ≥17.5, position angle of 128.°3, inclination angle ≤6. °6 and intrinsic half opening angle ≤1. °8 are derived from the VLBA data. These inferences are employed in a helical jet model to infer long-term variability in flux density, polarization degree, EVPA, and a rotation of the Stokes Q and U parameters. A core distance of r core,43 GHz = 22.9 pc, and a magnetic field strength at 1 pc and the core location of 1.57 G and 0.07 G, respectively, are inferred using the core-shift method. The study is useful in the context of estimating jet parameters and in offering clues to distinguish mechanisms responsible for variability over different timescales.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- galaxies: active
- relativistic processes
- galaxies: jets
- quasars: individual (CTA 102)
- techniques: high angular resolution
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Li, X. F.
-
Mohan, P.
-
An, T.
-
Hong, X. Y.
-
Cheng, X. P.
-
Yang, Jun, 1979
-
visa fler...
-
Zhang, Y. K.
-
Zhang, Z. L.
-
Zhao, Wei
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Astronomi astrof ...
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
-
och Fusion plasma oc ...
- Artiklar i publikationen
-
Astrophysical Jo ...
- Av lärosätet
-
Chalmers tekniska högskola