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We present JWST NIRSpec spectro-imaging observations of jets from four edge-on protoplanetary disks that exhibit clear signatures of MHD disk winds. Bipolar jets are detected and spatially resolved in over 30 shock-excited forbidden lines,…

Radio and X-ray observations of the relativistic jets of microquasars show evidence for the acceleration of particles to very high energies. Signatures of non-thermal processes occurring closer in to the compact object can also be found. In…

Astrophysics · Physics 2007-05-23 Guillaume Dubus

We have obtained milliarcsecond-scale spectral index distributions for a sample of 190 extragalactic radio jets through the MOJAVE project. The sources were observed in 2006 at 8.1, 8.4, 12.1, and 15.4 GHz, and we study the four-frequency…

Some X-shaped radio galaxies show a Z-symmetric morphology in the less luminous secondary lobes. Within the scenario of a merger between two galaxies, each hosting a supermassive black hole in its center, this structure has been explained…

Astrophysics · Physics 2009-11-13 Christian Zier

For the interpretation of X-ray radiation from kiloparsec jets of quasars, the inverse Compton scattering of the cosmic microwave background has been widely used for almost 20 years. A recent analysis of the Fermi-LAT observational data…

High Energy Astrophysical Phenomena · Physics 2020-12-10 M. S. Butuzova , A. B. Pushkarev , E. S. Shablovinskaya , S. V. Nazarov

Over the past two decades, the most commonly adopted explanation for high and hard X-ray emission in resolved quasar jets has been inverse Compton upscattering of the Cosmic Microwave Background (IC/CMB), which requires jets which remain…

High Energy Astrophysical Phenomena · Physics 2019-09-25 Eileen T. Meyer , Adurshsiva R. Iyer , Karthik Reddy , Markos Georganopoulos , Peter Breiding , Mary Keenan

We analytically model stationary and axisymmetric active galactic nucleus jets, assuming energy conservation along each magnetic flux tube. Using very-long-baseline interferometry (VLBI) observations and published general relativistic…

High Energy Astrophysical Phenomena · Physics 2025-08-11 Kouichi Hirotani , Hsien Shang , Ruben Krasnopolsky , Satoki Matsushita , Britton Jeter , Keiichi Asada

Previous molecular gas observations at arcsecond-scale resolution of the Seyfert 2 galaxy M51 suggest the presence of a dense circumnuclear rotating disk, which may be the reservoir for fueling the active nucleus and obscures it from direct…

Astrophysics · Physics 2010-05-25 Satoki Matsushita , Sebastien Muller , Jeremy Lim

We present the results of a number of high resolution radio observations of the AGN 1156+295. These include multi-epoch and multi-frequency VLBI, VSOP, MERLIN and VLA observations made over a period of 50 months. The 5 GHz MERLIN images…

Active galactic nuclei (AGNs) can power relativistic jets, which are called blazars when pointed close to our line of sight. Depending on the presence or absence of emission lines in their optical spectra, blazars are categorized into flat…

High Energy Astrophysical Phenomena · Physics 2024-04-23 Garima Rajguru , L. Marcotulli , M. Ajello , A. Tramacere

Recently, microquasar jets have aroused the interest of many researchers focusing on the astrophysical plasma outflows and various jet ejections. In this work, we concentrate on the investigation of electromagnetic radiation and particle…

High Energy Astrophysical Phenomena · Physics 2022-03-02 Theodora Papavasileiou , Odysseas Kosmas , Ioannis Sinatkas

The structured jet is involved to explain the afterglows and even the prompt emission of GRB 170817A. In this paper, we stress that for a precessing jet, the jet structure in the prompt emission phase and that in the afterglow phase may be…

High Energy Astrophysical Phenomena · Physics 2019-06-26 Bao-Quan Huang , Da-Bin Lin , Tong Liu , Jia Ren , Xiang-Gao Wang , Hong-Bang Liu , En-Wei Liang

Astrophysical jets exist in both XRBs and AGN, and seem to share common features, particularly in the radio. While AGN jets are known to emit X-rays, the situation for XRB jets is not so clear. Radio jets have been resolved in several XRBs…

Astrophysics · Physics 2009-11-07 S. Markoff , M. Nowak , S. Corbel , R. Fender , H. Falcke

In X-ray binaries, compact jets are known to commonly radiate at radio to infrared frequencies, whereas at optical to gamma-ray energies, the contribution of the jet is debated. The total luminosity, and hence power of the jet is critically…

As a natural consequence of galaxy mergers, binary active galactic nuclei (AGNs) should be commonplace. Nevertheless, observational confirmations are rare, especially for binaries with separations less than ten kpc. Such a system may show…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Hai Fu , Adam D. Myers , S. G. Djorgovski , Lin Yan

Very long base interferometry (VLBI) radio images recently proved to be essential in breaking the degeneracy in the ejecta model for the neutron star merger GW170817. We discuss the properties of synthetic radio images of merger jet…

High Energy Astrophysical Phenomena · Physics 2021-12-07 Joseph John Fernández , Shiho Kobayashi , Gavin P. Lamb

We present a novel fully Bayesian analysis to constrain short gamma-ray burst jet structures associated with cocoon, wide-angle and simple top-hat jet models, as well as the binary neutron star merger rate. These constraints are made given…

High Energy Astrophysical Phenomena · Physics 2023-05-12 Fergus Hayes , Ik Siong Heng , Gavin Lamb , En-Tzu Lin , John Veitch , Michael J. Williams

Very Long Baseline Array images of the X-ray binary, Cygnus X-3, were obtained 2, 4 and 7 days after the peak of a 10 Jy flare on 4 February 1997. The first two images show a curved one-sided jet, the third a scatter-broadened disc,…

The electromagnetic radiation that followed the neutron star merger event GW170817 revealed that gamma-ray burst afterglows from jets misaligned with our line of sight exhibit a light curve with slowly rising flux. The slope of the rising…

High Energy Astrophysical Phenomena · Physics 2021-03-01 Hao Wang , Dimitrios Giannios

Nonthermal radiation observed from astrophysical systems containing relativistic jets and shocks, e.g., gamma-ray bursts (GRBs), active galactic nuclei (AGNs), and Galactic microquasar systems usually have power-law emission spectra. Recent…