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Related papers: Galactic disk winds driven by cosmic ray pressure

200 papers

Observations indicate that a continuous supply of gas is needed to maintain observed star formation rates in large, disky galaxies. To fuel star formation, gas must reach the inner regions of such galaxies. Despite its crucial importance…

Magnetized winds may be important in dispersing protoplanetary disks and influencing planet formation. We carry out global full magnetohydrodynamic simulations in axisymmetry, coupled with ray-tracing radiative transfer, consistent…

Earth and Planetary Astrophysics · Physics 2019-04-03 Lile Wang , Xue-Ning Bai , Jeremy Goodman

External cosmic rays impinging upon circumstellar disks associated with young stellar objects provide an important source of ionization, and as such, play an important role in disk evolution and planet formation. However, these incoming…

High Energy Astrophysical Phenomena · Physics 2018-04-25 Marco Fatuzzo , Fred C. Adams

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…

Astrophysics of Galaxies · Physics 2017-05-24 Daniel DeFelippis , Shy Genel , Greg Bryan , S. Michael Fall

Observations of stellar rotation show that low-mass stars lose angular momentum during the main sequence. We simulate the winds of Sun-like stars with a range of rotation rates, covering the fast and slow magneto-rotator regimes, including…

The class of B[e] supergiants is characterized by a two-component stellar wind consisting of a normal hot star wind in the polar zone and a slow and dense disk-like wind in the equatorial region. The properties of the disk wind are…

Astrophysics · Physics 2009-10-31 F. -J. Zickgraf

Cosmic rays (CRs) are an important component in the interstellar medium (ISM), but their effect on the dynamics of the disk-halo interface (< 10 kpc from the disk) is still unclear. We study the influence of CRs on the gas above the disk…

Winds from black hole accretion disks are essential ingredients in understanding the coevolution between the supermassive black hole and its host galaxy. The great difference of dynamical ranges from small-scale accretion disk simulations…

High Energy Astrophysical Phenomena · Physics 2020-02-19 Can Cui , Feng Yuan

The theory of radiation-driven winds succeeded in describing terminal velocities and mass loss rates of massive stars. However, for A-type supergiants the standard m-CAK solution predicts values of mass loss and terminal velocity higher…

Solar and Stellar Astrophysics · Physics 2015-05-28 M. Cure , L. Cidale , A. Granada

The propagation of Galactic cosmic rays is well understood in the context of the solar system but is poorly studied for M dwarf systems. Quantifying the flux of cosmic rays reaching exoplanets is important since cosmic rays are relevant in…

Solar and Stellar Astrophysics · Physics 2022-06-22 A. L. Mesquita , D. Rodgers-Lee , A. A. Vidotto , R. D. Kavanagh

Galactic superwinds may be driven by very hot outflows generated by overlapping supernovae within the host galaxy. We use the Chevalier & Clegg (CC85) wind model and the observed correlation between X-ray luminosities of galaxies and their…

Astrophysics of Galaxies · Physics 2015-06-17 Dong Zhang , Todd A. Thompson , Norman Murray , Eliot Quataert

Galactic winds play a crucial role in the ejection of the interstellar medium (ISM) into intergalactic space. This study presents a model that classifies possible transonic solutions of galactic winds in the gravitational potential of the…

Astrophysics of Galaxies · Physics 2023-10-05 Asuka Igarashi , Masao Mori , Shin'ya Nitta

(abridged) We present a semianalytic model of steady-state magnetically and radiatively driven disk outflows in Active Galactic Nuclei (AGNs) consisting of a continuous wind with embedded clouds. The continuous outflow is launched from the…

Astrophysics · Physics 2007-05-23 John E. Everett

We study the ejection of winds from thin accretion discs around stellar mass black holes and the time evolution of these winds in presence of radiation field generated by the accretion disc. Winds are produced by radiation, thermal pressure…

High Energy Astrophysical Phenomena · Physics 2021-01-06 Sananda Raychaudhuri , Mukesh K. Vyas , Indranil Chattopadhyay

We investigate the effects of cosmic ray (CR) dynamics on cold, dense clouds embedded in a hot, tenuous galactic halo. If the magnetic field does not increase too much inside the cloud, the local reduction in Alfv\'en speed imposes a…

High Energy Astrophysical Phenomena · Physics 2017-01-25 Joshua Wiener , S. Peng Oh , Ellen G. Zweibel

We perform 3D stratified shearing-box MHD simulations on the gas dynamics of protoplanetary disks threaded by net vertical magnetic field Bz. All three non-ideal MHD effects, Ohmic resistivity, the Hall effect and ambipolar diffusion are…

Earth and Planetary Astrophysics · Physics 2015-06-22 Xue-Ning Bai

A number of X-ray binaries exhibit clear evidence for the presence of disk winds in the high/soft state. A promising driving mechanism for these outflows is mass loss driven by the thermal expansion of X-ray heated material in the outer…

High Energy Astrophysical Phenomena · Physics 2017-02-15 Nick Higginbottom , Daniel Proga , Christian Knigge , Knox S. Long

We present new calculations of the mass inflow and outflow rates around the Milky Way, derived from a catalog of ultraviolet metal-line high velocity clouds (HVCs). These calculations are conducted by transforming the HVC velocities into…

Star-forming edge-on galaxies often exhibit extended halo radiation in multiple bands, providing ideal laboratories for studying the transfer of matter from the disk to the halo. We investigate the transport of cosmic-ray electrons (CREs)…

Astrophysics of Galaxies · Physics 2026-03-17 Shengtao Wang , Xiaohui Sun , George Heald , Jiang-Tao Li , Chao-Wei Tsai , Judith Irwin , Theresa Wiegert , Jun Xu

We present a semi-analytic treatment of galactic winds within high resolution, large scale cosmological N-body simulations of a LCDM Universe. The evolution of winds is investigated by following the expansion of supernova driven…

Astrophysics · Physics 2009-09-25 Serena Bertone , Felix Stoehr , Simon D. M. White