The effects of spiral arms on the multi-phase ISM

Abstract

Statistical parameters of the ISM driven by thermal energy injections from supernova explosions have been obtained from 3D, nonlinear, magnetohydrodynamic, shearing-box simulations for spiral arm and interarm regions. The density scale height obtained for the interarm regions is 50% larger than within the spiral arms because of the higher gas temperature. The filling factor of the hot gas is also significantly larger between the arms and depends sensitively on magnetic field strength.

arXiv comment6 pages, 4 figures, submitted to proceedings issue of Astrophysics & Space Science following the JENAM 2002 Workshop: "From observations to self-consistent modeling of the ISM in galaxies"

References in corpus (4)

• Star Formation in Galaxies Along the Hubble Sequence
• Disk-Halo Interaction - I. Three-Dimensional Evolution of the Galactic Disk
• 3D MHD Modeling of the Gaseous Structure of the Galaxy: Setup and Initial Results
• Mushroom-Shaped Structures as Tracers of Buoyant Flow in the Galactic Disk

Cited by in corpus (10)

• Interstellar Turbulence I: Observations and Processes
• Ultra-High-Energy Cosmic Rays
• Acceleration of ultrahigh-energy cosmic rays in starburst superwinds
• Supernova-regulated ISM -- V. Space- and time-correlations
• Galactic magnetic fields and hierarchical galaxy formation
• Galactic Spiral Patterns and Dynamo Action II: Asymptotic Solutions
• Ellipticals at z=0 from Self-Consistent Hydrodynamical Simulations: Clues on Age Effects in their Stellar Populations
• Mean fields and fluctuations in compressible magnetohydrodynamic flows
• Turbulence and galactic structure
• Self-regulating supernova heating in interstellar medium simulations