Cosmic ray driven galactic winds

Abstract

Galactic winds constitute a primary feedback process in the ecology and evolution of galaxies. They are ubiquitously observed and exhibit a rich phenomenology, whose origin is actively investigated both theoretically and observationally. Cosmic rays have been widely recognized as a possible driving agent of galactic winds, especially in Milky-Way like galaxies. The formation of cosmic ray-driven winds is intimately connected with the microphysics of the cosmic ray transport in galaxies, making it an intrinsically non-linear and multiscale phenomenon. In this complex interplay the cosmic ray distribution affects the wind launching and, in turns, is shaped by the presence of winds. In this review we summarize the present knowledge of the physics of cosmic rays involved in the wind formation and of the wind hydrodynamics. We also discuss the theoretical difficulties connected with the study of cosmic ray-driven winds and possible future improvements and directions.

References in corpus (15)

• The present-day star formation rate of the Milky-Way determined from Spitzer detected young stellar objects
• Spectral breaks as a signature of cosmic ray induced turbulence in the Galaxy
• Constraining the Milky Way's Hot Gas Halo with OVII and OVII Emission Lines
• Star formation in a galactic outflow
• Do Hot Haloes Around Galaxies Contain the Missing Baryons?
• The baryon fraction of LambdaCDM haloes
• A Galactic Halo Origin of the Neutrinos Detected by IceCube
• A Review of Recent Observations of Galactic Winds Driven by Star Formation
• The dependence of cosmic ray driven galactic winds on halo mass
• Cosmic ray transport in starburst galaxies
• Time-dependent galactic winds I. Structure and evolution of galactic outflows accompanied by cosmic ray acceleration
• Cosmic Ray Scattering in Compressible Turbulence
• A guided map to the Spiral arms in the galactic disk of the Milky Way
• Can a cosmic ray carrot explain the ionization level in diffuse molecular clouds?
• Non-linear acceleration at supernova remnant shocks and the hardening in the cosmic ray spectrum

Cited by in corpus (4)

• Low energy cosmic rays
• Giant cosmic ray halos around M31 and the Milky Way
• Outflows in the presence of cosmic rays and waves with cooling
• Magnetohydrodynamic turbulence and the associated spatial diffusion tensor of cosmic rays in dynamical galactic halos