Results 31 to 40 of about 384,338 (204)
High Frequency VLBI Imaging of the Jet Base of M87 [PDF]
Astrophys.J.660:200-205,2007, 2007 VLBA and Global VLBI observations of M87 at 43 GHz, some new and some previously published, are used to study the structural evolution of the jet with a spatial resolution of under 100 Schwarzschild radii. The images, taken between 1999 and 2004, have an angular resolution of 0.00043" x 0.00021".
arxiv +1 more source
Galaxies, 2019 The particle-in-cell (PIC) method was developed to investigate microscopic phenomena, and with the advances in computing power, newly developed codes have been used for several fields, such as astrophysical, magnetospheric, and solar plasmas.
Ken-Ichi Nishikawa +10 more
doaj +1 more source
Jets from Tidal Disruption Events [PDF]
, 2019 The discovery of jets from tidal disruption events (TDEs) rejuvenated the old field of relativistic jets powered by accretion onto supermassive black holes. In this Chapter, we first review the extensive multi-wavelength observations of jetted TDEs. Then, we show that these events provide valuable information on many aspects of jet physics from a new ...
arxiv +1 more source
Decelerating relativistic two-component jets [PDF]
Astrophys.J.705:1594-1606,2009, 2009 Transverse stratification is a common intrinsic feature of astrophysical jets. There is growing evidence that jets in radio galaxies consist of a fast low density outflow at the jet axis, surrounded by a slower, denser, extended jet. The inner and outer jet components then have a different origin and launching mechanism, making their effective inertia,
arxiv +1 more source
A Shock-in-Jet Synchrotron Mirror Model for Blazars
Physics, 2021 Reinhard Schlickeiser has made groundbreaking contributions to various aspects of blazar physics, including diffusive shock acceleration, the theory of synchrotron radiation, the production of gamma-rays through Compton scattering in various ...
Markus Böttcher
doaj +1 more source
Relativistic AGN jets II. Jet properties and mixing effects for episodic jet activity [PDF]
, 2013 Various radio galaxies show signs of having gone through episodic jet outbursts in the past. An example is the class of double-double radio galaxies (DDRGs). However, to follow the evolution of an individual source in real-time is impossible due to the large time scales involved.
arxiv +1 more source
The effects of the stellar wind and orbital motion on the jets of high-mass microquasars [PDF]
A&A 590, A119 (2016), 2016 High-mass microquasar jets propagate under the effect of the wind from the companion star, and the orbital motion of the binary system. The stellar wind and the orbit may be dominant factors determining the jet properties beyond the binary scales.} An analytical study is performed to characterize the effects of the stellar wind and the orbital motion ...
arxiv +1 more source
High Energy Neutrino Emission from Astrophysical Jets in the Galaxy
Advances in High Energy Physics, 2015 We address simulated neutrino emission originated from astrophysical jets of compact objects within the Galaxy. These neutrinos are of high energies (Eν of the order up to a few TeV) and for their observation specialized instruments are in operation ...
T. Smponias, O. T. Kosmas
doaj +1 more source
Mon. Not. R. Astron. Soc. 471, 4121 (2017), 2017 New high-resolution Very Long Baseline Interferometer observations of the prominent jet in the M87 radio galaxy show a persistent triple-ridge structure of the transverse 15-GHz profile with a previously unobserved ultra-narrow central ridge. This radio structure can reflect the intrinsic structure of the jet, so that the jet as a whole consists of two
arxiv +1 more source
The Relativistic Jet Dichotomy and the End of the Blazar Sequence [PDF]
, 2020 Our understanding of the unification of jetted AGN has evolved greatly as jet samples have increased in size. Here, based on the largest-ever sample of over 2000 well-sampled jet spectral energy distributions, we examine the synchrotron peak frequency -- peak luminosity plane, and find little evidence for the anti-correlation known as the blazar ...
arxiv +1 more source