Results 261 to 270 of about 272,836 (286)

Relativistic Jets in Stellar Systems

2014
Albeit their nature remains elusive, relativistic, collimated outflows of energy and particles appear to be a nearly ubiquitous feature of accreting black holes. As evidence accumulates for a dominant role of the jet in dissipating the liberated accretion power, questions around their powering mechanism and even composition remain unanswered.
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Stellar and Extragalactic Jets: An Introduction

1987
In recent years collimated outflows of gas, commonly called jets, have been discovered in various astrophysical objects. The most prominent ones are those in extragalactic radio sources including objects such as powerful and weak radio galaxies, quasars and Seyfert galaxies (see,e.g., the reviews by BRIDLE and PERLEY [1] and PERLEY [2]), but also jet ...
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Coupled Stellar Jet/Molecular Outflow Models

Astrophysics and Space Science, 1994
Molecular outflows can be modelled as environmental material entrained into high velocity stellar jets. Even though models of this entrainment process are at this time quite uncertain, a few preliminary theoretical efforts have been made. Three different models are discussed, in which the molecular outflows are identified with the turbulent mixing ...
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Application of Tomographic Techniques to Stellar Jets

2009
We show how standard tomographic techniques may be applied to study the three dimensional structure of stellar jets. To achieve this, we invert observed emission maps, and determine the physical parameters from the line ratios. For the first time this technique is applied to the HH30 jet, showing that the jet is denser and more fragmented than what can
Fabio De Colle, Carlos del Burgo, Alejandro C. Raga   +2 more
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The Kelvin-Helmholtz Instability in Stellar Jets

2009
The Kelvin-Helmholtz Instability (KHI) is amongst the most relevant processes occurring in outflows propagating through an external medium. The KHI can critically affect the dynamics of jets leading to their disruption, but at same time it drives the formation of the peculiar morphologies observed in stellar collimated outflows.
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Measurement of Magnetic Fields in Stellar Jets

2009
This article reviews magnetic field measurements in jets from young stars, focusing on the physics and application of the three main techniques, Zeeman splitting and polarization, gyrosynchrotron radiation, and the analysis of shocked cooling zones. Estimates of field strengths in stellar jets are rare, and do not refer to the axis of the beam close to
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Measurement of Physical Conditions in Stellar Jets

2007
This article summarizes the physics needed to interpret spectra of stellar jets, reviews the history of analysis techniques applied to these objects, discusses some recent results, and considers the prospects for future research in this area.
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Acceleration of Relativistic Particles in Stellar Jets

1993
A model is presented that can account for the nonthermal emission seen in some Young Stellar Objects. The relativistic electrons producing the synchrotron radiation can be accelerated at the (collisionless) bow shocks or termination shocks that are formed when jets from the central object propagate into the molecular cloud.
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Influence of protostellar jets and HII regions on the formation and evolution of stellar clusters

Astronomy and Astrophysics, 2022
Patrick Hennebelle, Sam Geen, Antoine Verliat   +2 more
exaly  

Search for radio jets from massive young stellar objects

Astronomy and Astrophysics, 2021
Riccardo Cesaroni, Alvaro Sánchez-Monge, Umit Kavak   +2 more
exaly