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Related papers: The Launching of Cold Clouds by Galaxy Outflows I:…

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We explore the impact of electron thermal conduction on the evolution of radiatively-cooled cold clouds embedded in flows of hot and fast material, as occur in outflowing galaxies. Performing a parameter study of three-dimensional adaptive…

Astrophysics of Galaxies · Physics 2016-05-25 Marcus Brüggen , Evan Scannapieco

Motivated by observations of outflowing galaxies, we investigate the combined impact of magnetic fields and radiative cooling on the evolution of cold clouds embedded in a hot wind. We perform a collection of three-dimensional adaptive mesh…

Astrophysics of Galaxies · Physics 2020-04-08 J'Neil Cottle , Evan Scannapieco , Marcus Bruggen , Wladimir Banda-Barragan , Christoph Federrath

Multiphase outflows, revealed by multi-wavelength observations, are crucial in redistributing gas and metals within and around galaxies. These outflows are often modelled theoretically using wind tunnel simulations of a cold ($\sim 10^4$ K)…

Astrophysics of Galaxies · Physics 2025-12-10 Alankar Dutta , Prateek Sharma , Max Gronke

Outflows are a key part of the galactic gas cycle and crucial in shaping the star formation activity in their host galaxy. Yet, in simulations of galaxy evolution, modeling these outflows in their multi-phase nature and over the relevant…

Astrophysics of Galaxies · Physics 2025-08-26 Francesco Bollati , Rainer Weinberger

I present a suite of three-dimensional simulations of the evolution of initially-hot material ejected by starburst-driven galaxy outflows. The simulations are conducted in a comoving frame that moves with the material, tracking atomic/ionic…

Astrophysics of Galaxies · Physics 2017-03-08 Evan Scannapieco

We study steady, radial gas outflows from galaxies in an effort to understand the way tenuous and hot gas is transported to large distances away from galaxies. In particular, we obtain solutions for outflow problems, and study the outflow…

Astrophysics · Physics 2009-10-22 Boqi Wang

Both absorption and emission line studies show that cold gas around galaxies is commonly outflowing at speeds of several hundred km$\,\textrm{s}^{-1}$. This observational fact poses a severe challenge to our theoretical models of galaxy…

Astrophysics of Galaxies · Physics 2018-07-25 Max Gronke , S. Peng Oh

2d hydrodynamical simulations are performed to examine the evaporation and condensation processes of giant molecular clouds in the hot phase of the interstellar medium. The evolution of cold and dense clouds is calculated in the subsonic…

Astrophysics · Physics 2009-10-31 Wolfgang Vieser , Gerhard Hensler

Galactic outflows commonly contain multiphase gas, and its physical origin requires explanation. Using the CGOLS (Cholla Galactic OutfLow Simulations) suite of high-resolution isolated galaxy models, we demonstrate the viability of rapid…

Astrophysics of Galaxies · Physics 2018-08-09 Evan E. Schneider , Brant E. Robertson , Todd A. Thompson

We study the formation of disks via the cooling flow of gas within galactic haloes using smoothed particle hydrodynamics simulations. These simulations resolve mass scales of a few thousand solar masses in the gas component for the first…

Astrophysics · Physics 2009-11-11 Tobias Kaufmann , Lucio Mayer , James Wadsley , Joachim Stadel , Ben Moore

We carry out a suite of simulations of the evolution of cosmic-ray (CR) driven, radiatively-cooled cold clouds embedded in hot material, as found in galactic outflows. In such interactions, CRs stream towards the cloud at the Alfv\'en…

Astrophysics of Galaxies · Physics 2020-12-16 Marcus Brüggen , Evan Scannapieco

Momentum deposition by radiation pressure from young, massive stars may help to destroy molecular clouds and unbind stellar clusters by driving large-scale outflows. We extend our previous numerical radiation hydrodynamic study of…

Astrophysics of Galaxies · Physics 2017-12-06 Sudhir Raskutti , Eve C. Ostriker , M. Aaron Skinner

We report three-dimensional hydrodynamical simulations of shocks (${\cal M_{\rm shock}}\geq 4$) interacting with fractal multicloud layers. The evolution of shock-multicloud systems consists of four stages: a shock-splitting phase in which…

We study, by numerical simulations, the entrainment process in a supersonic, radiative jet flow, during the evolution of Kelvin-Helmholtz instabilities, in the context of the the acceleration problem of molecular bipolar outflows, observed…

Astrophysics · Physics 2007-05-23 M. Micono , G. Bodo , S. Massaglia , P. Rossi , A. Ferrari

We present three-dimensional, adaptive mesh simulations of dwarf galaxy out- flows driven by supersonic turbulence. Here we develop a subgrid model to track not only the thermal and bulk velocities of the gas, but also its turbulent…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Evan Scannapieco , Marcus Brüggen

Galactic winds exhibit a multiphase structure that consists of hot-diffuse and cold-dense phases. Here we present high-resolution idealised simulations of the interaction of a hot supersonic wind with a cold cloud with the moving-mesh code…

Astrophysics of Galaxies · Physics 2018-11-28 Martin Sparre , Christoph Pfrommer , Mark Vogelsberger

Galaxies comprise intricate networks of interdependent processes which together govern their evolution. Central among these are the multiplicity of feedback channels, which remain incompletely understood. One outstanding problem is the…

Astrophysics of Galaxies · Physics 2023-12-11 Brent Tan , Drummond B. Fielding

Cold, non-self-gravitating clumps occur in various astrophysical systems, ranging from the interstellar and circumgalactic medium (CGM), to AGN outflows and solar coronal loops. Cold gas has diverse origins such as turbulent mixing or…

Astrophysics of Galaxies · Physics 2021-12-23 Alankar Dutta , Prateek Sharma , Dylan Nelson

Galactic and intergalactic flows often exhibit relative motion between the cold dense gas and the hot diffuse medium. Such multiphase flows -- involving gas at different temperatures, densities, and ionization states -- for instance,…

Astrophysics of Galaxies · Physics 2025-10-07 Ritali Ghosh , Max Gronke , Prateek Sharma , Alankar Dutta

To examine the evolution of giant molecular clouds in the stream of a hot plasma we performed two-dimensional hydrodynamical simulations that take full account of self-gravity, heating and cooling effects and heat conduction by electrons.…

Astrophysics · Physics 2009-11-13 W. Vieser , G. Hensler
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