Dynamical Friction in Interacting Relativistic Systems
arXiv:1906.05341 · doi:10.1088/1475-7516/2019/08/017
Abstract
We study dynamical friction in interacting relativistic systems with arbitrary mean free paths and medium constituent masses. Our novel framework recovers the known limits of ideal gas and ideal fluid when the mean free path goes to infinity or zero, respectively, and allows for a smooth interpolation between these limits. We find that in an infinite system the drag force can be expressed as a sum of ideal-gas-like and ideal-fluid-like contributions leading to a finite friction even at subsonic velocities. This simple picture receives corrections in any finite system and the corrections become especially significant for a projectile moving at a velocity close to the speed of sound . These corrections smoothen the ideal fluid discontinuity around the speed of sound and render the drag force a continuous function of velocity. We show that these corrections can be computed to a good approximation within effective theory of viscous fluid dynamics.
arXiv comment33 pages, 8 figures
References in corpus (18)
- Relativistic viscous hydrodynamics, conformal invariance, and holography
- Dynamical Friction in a Gaseous Medium
- Collective Modes of an Anisotropic Quark-Gluon Plasma
- Constraints on primordial black holes as dark matter candidates from capture by neutron stars
- Dark Matter Triggers of Supernovae
- Thermalization in Weakly Coupled Nonabelian Plasmas
- On the interpretation of dark matter self-interactions in Abell 3827
- Dynamical Friction of a Circular-Orbit Perturber in a Gaseous Medium
- Constraints on primordial black holes as dark matter candidates from star formation
- Retarded Correlators in Kinetic Theory: Branch Cuts, Poles and Hydrodynamic Onset Transitions
- Astrophysical implications of hypothetical stable TeV-scale black holes
- Sonic Mach Cones Induced by Fast Partons in a Perturbative Quark-Gluon Plasma
- Tidal capture of a primordial black hole by a neutron star: implications for constraints on dark matter
- AdS black holes and thermal Yang-Mills correlators
- Relativistic dynamical friction in a collisional fluid
- Damping of gravitational waves by matter
- Bulk viscosity of strongly interacting matter in the relaxation time approximation
- Relativistic Dynamical Friction in the Weak Scattering Limit