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Related papers: The Trails of Superluminal Jet Components in 3C111

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Relativistic outflows represent one of the best-suited tools to probe the physics of AGN. Numerical modelling of internal structure of the relativistic outflows on parsec scales provides important clues about the conditions and dynamics of…

Astrophysics · Physics 2015-06-24 M. Perucho , A. P. Lobanov , J. M. Marti

We present high resolution MERLIN radio images of multiple relativistic ejections from GRS 1915+105 in 1997 October / November. The observations were made at a time of complex radio behaviour, corresponding to multiple optically-thin…

We use published data in radio, optical and X-ray bands to analyze and model afterglows of GW/GRB 170817A. Our analysis is based on a phenomenological gamma-ray burst generator model which we previously used to study the prompt gamma-ray…

High Energy Astrophysical Phenomena · Physics 2019-10-09 Houri Ziaeepour

In spring 2005 the blazar 3C 454.3 was observed in an unprecedented bright state from the near-IR to the hard X-ray frequencies. A mm outburst peaked in June-July 2005, and it was followed by a flux increase at high radio frequencies. In…

Astrophysics · Physics 2020-05-06 M. Villata , C. M. Raiteri , M. F. Aller

We present the analysis of Suzaku and XMM-Newton observations of the broad-line radio galaxy (BLRG) 3C 111. Its high energy emission shows variability, a harder continuum with respect to the radio quiet AGN population, and weak reflection…

High Energy Astrophysical Phenomena · Physics 2015-05-30 L. Ballo , V. Braito , J. N. Reeves , R. M. Sambruna , F. Tombesi

The advent of global mm-band Very Long Baseline Interferometry (VLBI) in recent years has finally revealed the morphology of the base of the two most prominent nearby, bright, extragalactic radio jets in M\,87 and 3C\,84. The images are…

Astrophysics of Galaxies · Physics 2021-04-21 Brian Punsly , Hiroshi Nagai , Tuomas Savolainen , Monica Orienti

We present the analysis of the radio jet evolution of the radio galaxy 3C 120 during a period of prolonged gamma-ray activity detected by the Fermi satellite between December 2012 and October 2014. We find a clear connection between the…

Very Long Baseline Polarimetric observations of the Broad Line Radio galaxy 3C111 performed in July and September of 1996 at 8 and 43 GHz reveal rapidly evolving parsec-scale radio structure after a large millimetre outburst. The B-field…

Astrophysics · Physics 2009-11-07 P. Kharb , D. Gabuzda , W. Alef , E. Preuss , P. Shastri

As part of a multi-wavelength campaign to observe the 2000--2002 outburst of the prototypical symbiotic star Z Andromedae, we observed this object six times each with the Multi-Element Radio Linked Interferometer Network (MERLIN) and Very…

Astrophysics · Physics 2009-11-10 C. Brocksopp , J. L. Sokoloski , C. Kaiser , A. M. Richards , T. W. B. Muxlow , N. Seymour

SN 2001em, identified as a Type Ic supernova, has recently been detected in the radio and X-rays, $\gtrsim$ 2 yr after the explosion. The high luminosities at such late times might arise from a relativistic jet viewed substantially off-axis…

Astrophysics · Physics 2009-11-10 Jonathan Granot , Enrico Ramirez-Ruiz

We present a preliminary analysis of new high resolution radio observations of the nearby TeV blazar Markarian 421 (z=0.031). This study is part of an ambitious multifrequency campaign, with observations in sub-mm (SMA), optical/IR (GASP),…

We present 5321 milliarcsecond-resolution total intensity and linear polarization maps of 437 active galactic nuclei (AGNs) obtained with the VLBA at 15 GHz as part of the MOJAVE survey, and also from the NRAO data archive. The former is a…

Astrophysics of Galaxies · Physics 2018-01-18 M. L. Lister , M. F. Aller , H. D. Aller , M. A. Hodge , D. C. Homan , Y. Y. Kovalev , A. B. Pushkarev , T. Savolainen

The major multi-epoch VLBA programs are described and discussed in terms of relativistic beaming models. Broadly speaking the observed kinematics are consistent with models having a parent population which is only mildly relativistic but…

Astrophysics · Physics 2009-07-22 K. I. Kellermann , M. L. Lister , D. C. Homan , Y. Y. Kovalev , M. Kadler , M. C. Cohen

We present observations of a major outburst at centimeter, millimeter, optical, X-ray, and gamma-ray wavelengths of the BL Lacertae object AO 0235+164 in 2008. We analyze the timing of multi-waveband variations in the flux and linear…

The enormous sizes and variability of emission of radio-loud AGNs arise from the relativistic flows of plasma along two oppositely directed jets. We use the Athena hydrodynamics code to simulate an extensive suite of 54 propagating…

Astrophysics of Galaxies · Physics 2018-12-19 Yutong Li , Paul J. Wiita , Terance Schuh , Geena Elghossain , Shaoming Hu

We conducted a comprehensive investigation of the brightest-of-all-time GRB 221009A using new insights from very high energy (VHE) observations from LHAASO and a complete multiwavelength afterglow dataset. Through data fitting, we imposed…

High Energy Astrophysical Phenomena · Physics 2024-01-09 Ren Jia , Wang Yun , Dai Zi-Gao

3C 84 is a nearby Active Galactic Nucleus (AGN) that is unique in that is believed that we are observing near the true jet launching region - unlike blazars. The source is active in Gamma rays and has been detected with Fermi since its…

High Energy Astrophysical Phenomena · Physics 2018-02-09 Jeffrey A. Hodgson , Bindu Rani , Junghwan Oh

We present a comparison of the parameters of accretion disc outflows and the jet of the broad-line radio galaxy 3C 111 on sub-pc scales. We make use of published X-ray observations of ultra-fast outflows (UFOs) and new 43GHz VLBA images to…

High Energy Astrophysical Phenomena · Physics 2015-06-05 F. Tombesi , R. M. Sambruna , A. P. Marscher , S. G. Jorstad , C. S. Reynolds , A. Markowitz

The quasar 3C345 is one of the best examples of extragalactic jet with superluminal components moving on helical paths. To get better constraints on the jet physics, we have imaged the source at the highest possible resolution, using…

Astrophysics · Physics 2007-05-23 J. Klare , J. A. Zensus , T. P. Krichbaum , A. P. Lobanov , E. Ros

We present the results of six-epoch Very Long Baseline Array (VLBA) observations of 3C~66A. The high-resolution Very Long Baseline Interferometer (VLBI) maps obtained at multi-frequency (2.3, 8.4, and 22.2 GHz) simultaneously enabled us to…

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