Estimating the Fuel Supply Rate on the Galactic Disk from High Velocity Clouds (HVCs) Infall
arXiv:1906.10294 · doi:10.3847/1538-4357/ab2ad7
Abstract
Previous studies suggest that the estimated maximum accretion rate from approaching high velocity clouds (HVCs) on the Galactic disk can be up to ~ 0.4 solar mass per year. In this study, we point out that the hydrodynamic interaction between the HVCs and the Galactic disk is not considered in the traditional method of estimating the infall rate and therefore the true supply rate of fuel from HVCs can be different from the suggested value depending on the physical configurations of HVCs including density, velocity, and distance. We choose 11 HVC complexes and construct 4 different infall models in our simulations to give an idea of how the fuel supply rate could be different from the traditional infall rate. Our simulation results show that the fuel supply rate from HVC infall is overestimated in the traditional method and can be lowered by a factor of ~ 0.072 when the hydrodynamic interaction of the HVC complexes and the disk is considered.
arXiv comment8 pages, 5 figures
References in corpus (18)
- Abundance Gradients and the Formation of the Milky Way
- Gaseous Galaxy Halos
- High Velocity Clouds: Building Blocks of the Local Group
- Accretion of gas onto nearby spiral galaxies
- Global properties of the HI distribution in the outer Milky Way
- Distances to Galactic high-velocity clouds. I. Cohen Stream, complex GCP, cloud g1
- Distances to Galactic high-velocity clouds. Complex C
- An Accurate Distance to High-Velocity Cloud Complex C
- Smith's Cloud: A High-velocity Cloud Colliding with the Milky Way
- The Magnetohydrodynamics of Supersonic Gas Clouds: MHD Cosmic Bullets and Wind-Swept Clumps
- The Collisions of HVCs with a Magnetized Gaseous Galactic Disk
- The Galactic Nature of High Velocity Cloud Complex WB
- Simulations of High-Velocity Clouds. I. Hydrodynamics and High-Velocity High Ions
- The Evolution of Gas Clouds Falling in the Magnetized Galactic Halo: High Velocity Clouds (HVCs) Originated in the Galactic Fountain
- Supersonic Collisions between Two Gas Streams
- High-energy radiation from collisions of high velocity clouds and the Galactic disk
- The First Distance Constraint on the Renegade High Velocity Cloud Complex WD
- GCN: a gaseous Galactic halo stream?