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Properties of Knots in Cooling Stellar Jets
Astrophysics and Space Science, 2004Modelling the formation of the maximal emission regions in Herbig-Haro flows, the socalled ‘knots,’ remains a main challenge in the investigation of the YSO’s outflows. Recent HST images of optical regions reveal their wide morphological variety. Knotty structures and arc-like regions coexist, suggesting that several mechanisms could be responsible for
RUBINI, FRANCESCO MARIO +4 more
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2021
Jets produced by compact stars are the ideal laboratories for understanding jets in general due to the ability to measure accretors properties accurately, and the short timescales of variability of the systems. We outline what is needed to move forward with understanding jet production in X-ray binaries.
Maccarone, Thomas +11 more
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Jets produced by compact stars are the ideal laboratories for understanding jets in general due to the ability to measure accretors properties accurately, and the short timescales of variability of the systems. We outline what is needed to move forward with understanding jet production in X-ray binaries.
Maccarone, Thomas +11 more
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MHD Numerical Simulations of Proto-Stellar Jets
Space Science Reviews, 2003We will summarize in this paper the effects that the presence of the magnetic field can cause to proto-stellar jet dynamics, structure and emission line properties, and the differences between two- and three-dimensional numerical simulations will be emphasized.
Adriano Hoth Cerqueira +1 more
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Relativistic Jets in Stellar Systems
2014Albeit 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
1987In 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, 1994Molecular 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
2009We 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 +2 more
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Acceleration of Relativistic Particles in Stellar Jets
1993A 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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Measurement of Magnetic Fields in Stellar Jets
2009This 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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Search for radio jets from massive young stellar objects
Astronomy and Astrophysics, 2021U Kavak, A Sánchez-Monge, R Cesaroni
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