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In this contribution I summarize our current knowledge of the nature and significance of starburst-driven galactic superwinds. These flows are driven primarily by the kinetic energy supplied by supernovae. Superwinds are complex, multiphase…

天体物理学 · 物理学 2007-05-23 Timothy M. Heckman

Fast stellar winds can sweep up ambient media and form bubbles. The evolution of a bubble is largely controlled by the content and physical conditions of the shocked fast wind in its interior. This hot gas was not clearly observed until the…

天体物理学 · 物理学 2007-05-23 You-Hua Chu , Robert A. Gruendl , Martin A. Guerrero

Outflows play a pivotal role in star formation as one of its most visible markers and a means of transporting mass, momentum, and angular momentum from the infalling gas into the surrounding molecular cloud. Their wide reach (at least…

太阳与恒星天体物理 · 物理学 2024-03-18 Shantanu Basu , Mahmoud Sharkawi , Masahiro N. Machida

We present the results of time-dependent, numerical magnetohydrodynamic simulations of a realistic young stellar object outflow model with the addition of a disk-associated magnetic field. The outflow produced by the magnetic star-disk…

天体物理学 · 物理学 2009-11-07 S. Matt , R. M. Winglee , K. -H. Bohm

The combined effects of supernova explosions and stellar winds produce a hot bubble in the central regions of starburst galaxies. As the bubble expands, it can outbreak into the galactic halo driving a superwind that transports hot gas and…

高能天体物理现象 · 物理学 2019-12-18 Gustavo E. Romero , Ana Laura Müller

The theory of Galactic Winds, driven by the cosmic-ray pressure gradient, is reviewed both on the magnetohydrodynamic and on the kinetic level. In this picture the magnetic field of the Galaxy above the dense gas disk is assumed to have a…

高能天体物理现象 · 物理学 2014-11-06 Heinrich J. Völk

We present 2-D hydrodynamic simulation of rotating galactic winds driven by radiation. We study the structure and dynamics of the cool and/or warm component($T \simeq 10^4$ K) which is mixed with dust. We have taken into account the total…

星系天体物理 · 物理学 2015-06-04 Indranil Chattopadhyay , Mahavir Sharma , Biman B. Nath , Dongsu Ryu

We present two-dimensional MHD numerical simulations for the interaction of high-velocity clouds with both magnetic and non-magnetic Galactic thick gaseous disks. For the magnetic models, the initial magnetic field is oriented parallel to…

天体物理学 · 物理学 2009-10-31 Alfredo Santillan , Jose Franco , Marco Martos , Jongsoo Kim

Stars with outflows interacting with ambient gas experience accelerations arising from the gravitational feedback induced by the interaction structure. In this work, three-dimensional (3D) local shearing box simulations are performed to…

星系天体物理 · 物理学 2025-08-12 Muxin Liu , Lile Wang , Peng Peng

We study the evolution of the interstellar and circumstellar media around massive stars (M > 40M_{\odot}) from the main sequence through to the Wolf-Rayet stage by means of radiationhydrodynamic simulations. We use publicly available…

太阳与恒星天体物理 · 物理学 2015-05-28 J. A. Toalá , S. J. Arthur

Stars in globular clusters lose mass through slow stellar winds that are retained by the stellar cluster and contribute to build up a non negligible intracluster medium over time. However, all the observations so far found only a negligible…

星系天体物理 · 物理学 2020-03-18 William Chantereau

Observed galactic disks have specific angular momenta similar to expectations for typical dark matter halos in $\Lambda$CDM. Cosmological hydrodynamical simulations have recently reproduced this similarity in large galaxy samples by…

星系天体物理 · 物理学 2017-05-24 Daniel DeFelippis , Shy Genel , Greg Bryan , S. Michael Fall

Feedback from star formation is thought to play a key role in the formation and evolution of galaxies, but its implementation in cosmological simulations is currently hampered by a lack of numerical resolution. We present and test a…

天体物理学 · 物理学 2011-06-29 Claudio Dalla Vecchia , Joop Schaye

Recent results from multi-wavelength observations of the inner few hundred pc of the Galactic center have added two new characteristics to the ISM in this unique region. One is the cosmic ray ionization rate derived from H$_3^+$…

星系天体物理 · 物理学 2019-12-25 F. Yusef-Zadeh , M. Wardle , I. Heywood , W. Cotton , M. Royster

Binary systems containing a massive star and a non-accreting pulsar present strong interaction between the stellar and the pulsar winds. The properties of this interaction, which largely determine the non-thermal radiation in these systems,…

高能天体物理现象 · 物理学 2015-02-16 Xavier Paredes-Fortuny , Valentí Bosch-Ramon , Manel Perucho , Marc Ribó

High redshift disc galaxies are more gas rich, clumpier, and more turbulent than local Universe galaxies. This early era of galaxy formation imprints the distribution and kinematics of the stars that we observe today, but it is not yet well…

星系天体物理 · 物理学 2022-03-30 Floor van Donkelaar , Oscar Agertz , Florent Renaud

We present a set of numerical experiments designed to systematically investigate how turbulence and magnetic fields influence the morphology, energetics, and dynamics of filaments produced in wind-cloud interactions. We cover 3D…

星系天体物理 · 物理学 2017-12-06 Wladimir Banda-Barragán , Christoph Federrath , Roland Crocker , Geoffrey Bicknell

We investigate the impact of ram pressure stripping due to the intracluster medium (ICM) on star-forming disk galaxies with a multi-phase interstellar medium (ISM) maintained by strong stellar feedback. We carry out radiation-hydrodynamics…

星系天体物理 · 物理学 2020-12-16 Jaehyun Lee , Taysun Kimm , Harley Katz , Joakim Rosdahl , Julien Devriendt , Adrianne Slyz

We report the finding of a new, local diffusion instability in a protoplanetary disk, which can operate in a dust fluid, subject to mass diffusion, shear viscosity, and dust-gas drag, provided diffusivity, viscosity, or both decrease…

地球与行星天体物理 · 物理学 2024-08-22 Konstantin Gerbig , Min-Kai Lin , Marius Lehmann

(Abridged) Infrared high-resolution imaging and interferometry have shown that the dust distribution is frequently elongated along the polar direction of an AGN. To explain these findings, we developed a model scenario for the inner ~30 pc…

星系天体物理 · 物理学 2018-08-15 B. Vollmer , M. Schartmann , L. Burtscher , F. Marin , S. Hoenig , R. Davies , R. Goosmann