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Investigation of propagation, conversion, and scattering of MHD waves in the Sun is very important for understanding the mechanisms of observed oscillations and waves in sunspots and active regions. We have developed 3D linear MHD numerical…

Astrophysics · Physics 2011-02-11 K. V. Parchevsky , A. G. Kosovichev

We show three-dimensional magnetohydrodynamical simulations of core collapse supernova in which the progenitor has magnetic fields inclined to the rotation axis. The simulations employed a simple empirical equation of state in which the…

Astrophysics · Physics 2009-11-13 Hayato Mikami , Yuji Sato , Tomoaki Matsumoto , Tomoyuki Hanawa

We present two-dimensional hydrodynamical simulations of both jet- and wind-driven models for protostellar outflows in order to make detailed comparisons to the kinematics of observed molecular outflows. Comparing the different simulations…

Astrophysics · Physics 2009-11-06 Chin-Fei Lee , James M. Stone , Eve C. Ostriker , Lee G. Mundy

We computed the thermal microwave emission from a 3D magnetohydrodynamic (MHD) simulation and compared it with observations of solar jets. The simulation treats the emergence of magnetic flux into the solar atmosphere and its interaction…

Solar and Stellar Astrophysics · Physics 2025-07-23 Costas E. Alissandrakis , Vasilis Archontis , Kostas Moraitis

Stellar magnetosphere and accretion disk interact, and a result should be outflow launched from the innermost vicinity of a protostellar object. We simulated physical conditions in this region by resistive MHD simulations. Outflows…

Solar and Stellar Astrophysics · Physics 2009-08-19 Miljenko Cemeljic , Hsien Shang , Tzu-Yang Chiang

Using simulated data-driven three-dimensional resistive MHD simulations of the solar atmosphere, we show that magnetic reconnection can be responsible of the formation of jets with characteristic of Type II spicules. For this, we…

Solar and Stellar Astrophysics · Physics 2018-04-06 J. J. González-Avilés , F. S. Guzmán , V. Fedun , G. Verth , S. Shelyag , S. Regnier

Neutron stars and black holes in X-ray binaries are observed to host strong collimated jets in the hard spectral state. Numerical simulations can act as a valuable tool in understanding the mechanisms behind jet formation and its…

High Energy Astrophysical Phenomena · Physics 2023-12-15 Pushpita Das , Oliver Porth

We present fully three-dimensional hydrodynamical simulations of radiative cooling jets propagating into stratified isothermal ambient media with power-law density and pressure distributions. The parameters used are mainly suitable for…

Astrophysics · Physics 2009-10-28 Elisabete M. de Gouveia Dal Pino , Mark Birkinshaw

Massive and luminous O-star atmospheres with winds have been studied primarily using one-dimensional (1D), spherically symmetric, and stationary models. However, observations and theory rather suggest that O-star atmospheres are highly…

Solar and Stellar Astrophysics · Physics 2024-02-02 D. Debnath , J. O. Sundqvist , N. Moens , C. Van der Sijpt , O. Verhamme , L. G. Poniatowski

Extragalactic relativistic jets are composed by charged particles and magnetic fields, as inferred from the synchrotron emission that we receive from them. The Larmor radii of the particles propagating along the magnetic field are much…

High Energy Astrophysical Phenomena · Physics 2017-08-07 Manel Perucho , José María Martí , José Luís Gómez , Antonio Fuentes

(Abridged) We here investigate, by means of fully 3-D Smoothed Particle Magnetohydrodynamic numerical simulations, the effects of magnetic fields on overdense, radiatively cooling, pulsed jets, using different initial magnetic field…

Astrophysics · Physics 2009-11-06 Adriano H. Cerqueira , Elisabete M. de Gouveia Dal Pino

Modern theoretical models of astrophysical jets combine accretion, rotation, and magnetic fields to launch and collimate supersonic flows from a central source. Near the source, magnetic field strengths must be large enough to collimate the…

To model the interaction between the solar wind and the interstellar wind, magnetic fields must be included. Recently Opher et al. 2003 found that, by including the solar magnetic field in a 3D high resolution simulation using the…

We present theoretical wavelength-dependent transit light curves for the giant planet HD209458b based on a number of state of the art 3D radiative hydrodynamical models. By varying the kinematic viscosity in the model we calculate…

Earth and Planetary Astrophysics · Physics 2015-05-30 Ian Dobbs-Dixon , Eric Agol , Adam Burrows

Within the framework of resistive MHD, implementing the C7 equilibrium atmosphere model and a 3D potential magnetic field realistic configuration, we simulate the formation of a plasm jet with the morphology, upward velocity up to 130 km/s…

Solar and Stellar Astrophysics · Physics 2020-05-29 J. J. González-Avilés , F. S. Guzmán , V. Fedun , G. Verth , R. Sharma , S. Shelyag , S. Regnier

Dense stellar winds may mass-load the jets of active galactic nuclei, although it is unclear what are the time and spatial scales in which the mixing takes place. We study the first steps of the interaction between jets and stellar winds,…

High Energy Astrophysical Phenomena · Physics 2017-11-01 Manel Perucho , Valentí Bosch-Ramon , Maxim V. Barkov

To test theoretical models of massive star formation it is important to compare their predictions with observed systems. To this end, we conduct CO molecular line radiative transfer post-processing of 3D magneto-hydrodynamic (MHD)…

Astrophysics of Galaxies · Physics 2024-03-11 Duo Xu , Jonathan C. Tan , Jan E. Staff , Jon P. Ramsey , Yichen Zhang , Kei E. Tanaka

A maximum jet efficiency line $R\sim 25$ ($R=L_{\rm jet}/L_{\rm bol}$), found in FRII radio galaxies by Fernandes et al., was extended to cover the full range of jet power by Punsly. Recent general relativistic magnetohydrodynamic (GRMHD)…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Shuang-Liang Li

Accurate modeling of astrophysical jets is critical for understanding accretion systems and their impact on the interstellar medium. While astronomical observations can validate models, they have limitations. Controlled laboratory…

Plasma Physics · Physics 2024-01-22 G. Rigon , C. Stoeckl , T. M. Johnson , J. Katz , J. Peebles , C. K. Li

Motivated by the first detections of rotation signatures in the DG Tau jet (Bacciotti et al. 2002), we examine possible biases affecting the relation between detected rotation signatures and true azimuthal velocity for self-similar MHD disc…

Astrophysics · Physics 2009-11-10 N. Pesenti , C. Dougados , S. Cabrit , J. Ferreira , F. Casse , P. Garcia , D. O'Brien
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