Results 11 to 20 of about 272,836 (286)

Jets from a stellar-mass black hole are as relativistic as those from supermassive black holes [PDF]

Nature Communications
Relativistic jets from supermassive black holes in active galactic nuclei are amongst the most powerful phenomena in the universe. Similar jets from stellar-mass black holes offer a chance to study the phenomena on accessible observation time scales ...
X. Zhang, W. Yu, F. Carotenuto, R. Fender, S. Motta, A. Bahramian, J. C. A. Miller-Jones, T. D. Russell, S. Corbel, P. A. Woudt, P. Atri, C. Knigge, G. R. Sivakoff, A. K. Hughes, J. van den Eijnden, J. H. Matthews, M. C. Baglio, P. Saikia   +17 more
doaj   +4 more sources

Steady stellar jets [PDF]

Monthly Notices of the Royal Astronomical Society, 1987
This paper contains some results of axisymmetric numerical calculations of the shock structures in steady supersonic jets in which there is significant radiative cooling. We find that the regularly spaced shock cells found in adiabatic jets still occur and that cooling can by itself induce shocks if it is fast enough.
S A E G Falle
exaly   +2 more sources

Relativistic stellar jets: dynamics and non-thermal radiation

EPJ Web of Conferences, 2013
Relativistic stellar jets, produced in binary systems called microquasars, propagate through media with different spatial scales releasing their energy in the form of work and radiation from radio to gamma rays.
Bosch-Ramon Valentí
doaj   +2 more sources

Quasi-periodic oscillations of GHz-band polarization in a black hole [PDF]

Nature Communications
Relativistic jets from accreting black holes radiate non-thermal emission which is highly variable in different time scales. Previous studies on black holes of different mass scales, including supermassive and stellar-mass black holes, only report flux ...
Wei Wang, Jiashi Chen, Pengfu Tian, Luis C. Ho, Xiaohui Sun, Pei Wang, Bing Zhang, Zheng Zheng, Xiao Chen, Ping Zhang, Haifan Zhu, Wen Yang, Botao Li   +12 more
doaj   +2 more sources

Diagnostics of inhomogeneous stellar jets [PDF]

Astronomy & Astrophysics, 2008
CONTEXT: In the interpretation of stellar jet observations, the physical parameters are usually determined from emission line ratios, obtained from spectroscopic observations or using the information contained in narrow band images. The basic hypothesis in the interpretation of the observations is that the emitting region is homogeneous along the line ...
De Colle, F., del Burgo, C., Raga, A. C.
openaire   +3 more sources

Scaling stellar jets to the laboratory: The power of simulations

Laser and Particle Beams, 2009
AbstractAdvances in laser and Z-pinch technology, coupled with the development of plasma diagnostics, and the availability of high-performance computers, have recently stimulated the growth of high-energy density laboratory astrophysics. In particular, a number of experiments have been designed to study radiative shocks and jets with the aim of ...
Stehlé, C., Ciardi, Andrea, Colombier, Jean-Philippe, Gonzales, M., Lanz, T., Marocchino, Alberto, Kozlova, M., Rus, B.   +7 more
openaire   +5 more sources

Heat transfer from swirling impinging jets [PDF]

, 1980
This thesis is concerned with the determination of the local and average mass/heat transfer--from swirling jets impinging orthogonally onto flat surfaces.
Mahmood, M.
core   +7 more sources

Interaction of young stellar object jets with their accretion disk [PDF]

Astronomy and Astrophysics, 2005
I reexamine recent observations of velocity profiles across jets blown by young stellar objects, and argue that the observations do not support the interpretation of jets rotating around their symmetry axes. Instead, I propose that the interaction of the jets with a twisted-tilted (wrapped) accretion disk can form the observed asymmetry in the jets ...
exaly   +3 more sources

Stellar jets with intrinsically variable sources

Astrophysical Journal, 1990
Models for high Mach number, isothermal, pressure-matched jets ejected from sources with variable velocities are presented. It is found that the relaxation of the assumption of a time-independent source allows the complex position-velocity diagrams and multiple bow shock structures observed in some stellar jets to be explained in a straightforward way.
Núria Calvet, J Canto, Alejandro C Raga   +2 more
exaly   +2 more sources

Velocity asymmetries in young stellar object jets [PDF]

Astronomy and Astrophysics, 2012
Context. It is well established that some YSO jets (e.g. RW Aur) display different propagation speeds between their blue and red shifted parts, a feature possibly associated with the central engine or the environment in which the jet propagates.\ud \ud Aims. To understand the origin of asymmetric YSO jet velocities, we investigate the efficiency of two
Konstantinos Karampelas, Sean Matt, Christophe Sauty   +2 more
exaly   +1 more source