Turbulence in the Tail of a Jellyfish Galaxy
arXiv:2303.15500 · doi:10.1093/mnras/stad874
Abstract
When galaxies move through the intracluster medium (ICM) inside galaxy clusters, the ram pressure of the ICM can strip the gas from galaxies. The stripped gas forms tails on the trailing side. These galaxies are hence dubbed ``jellyfish galaxies''. ESO 137-001 is a quintessential jellyfish galaxy located in the nearest rich cluster, the Norma cluster. Its spectacular multiphase tail has complex morphology and kinematics both from the imprinted galaxy's interstellar medium (ISM) and as a result of the interactions between the stripped gas and the surrounding hot plasma, mediated by radiative cooling and magnetic fields. We study the kinematics of the multiphase tail using high-resolution observations of the ionized and the molecular gas in the entire structure. We calculate the velocity structure functions (VSFs) in moving frames along the tail and find that turbulence driven by Kelvin-Helmholtz (KH) instability quickly overwhelms the original ISM turbulence and saturates at kpc. There is also a hint that the far end of the tail has possibly started to inherit pre-existing large-scale ICM turbulence likely caused by structure formation. Turbulence measured by the molecular gas is generally consistent with that measured by the ionized gas in the tail but has a slightly lower amplitude. Most of the measured turbulence is below the mean free path of the hot ICM ( kpc). Using warm/cool gas as a tracer of the hot ICM, we find that the isotropic viscosity of the hot plasma must be suppressed below 0.01 percent Spitzer level.
7 pages, 6 figures, accepted for publication in MNRAS
References in corpus (15)
- Turbulence and Magnetic Fields in the Large Scale Structure of the Universe
- MUSE sneaks a peek at extreme ram-pressure stripping events. I. A kinematic study of the archetypal galaxy ESO137-001
- Abundant molecular gas and inefficient star formation in intracluster regions: Ram pressure stripped tail of the Norma galaxy ESO137-001
- Direct Detection of Black Hole-Driven Turbulence in the Centers of Galaxy Clusters
- Suppressed effective viscosity in the bulk intergalactic plasma
- Stripped elliptical galaxies as probes of ICM physics: II. Stirred, but mixed? Viscous and inviscid gas stripping of the Virgo elliptical M89
- The Ties that Bind? Galactic Magnetic Fields and Ram Pressure Stripping
- Deep Chandra observations of NGC 1404: cluster plasma physics revealed by an infalling early-type galaxy
- The better half -- Asymmetric star-formation due to ram pressure in the EAGLE simulations
- Non-Kolmogorov turbulence in multiphase intracluster medium driven by cold gas precipitation and AGN jets
- Measuring Turbulence with Young Stars in the Orion Complex
- Empirical constraints on the turbulence in QSO host nebulae from velocity structure function measurements
- Probing the intergalactic turbulence with fast radio bursts
- Projected velocity statistics of interstellar turbulence
- Stress-Testing Cosmic Ray Physics: The Impact of Cosmic Rays on the Surviving Disk of Ram Pressure Stripped Galaxies