The Collisions of HVCs with a Magnetized Gaseous Galactic Disk
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2001
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| _version_ | 1876449807379202048 |
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| author | Alfredo Santillán |
| author_facet | Alfredo Santillán |
| contents | The Collisions of HVCs with a Magnetized Gaseous Galactic Disk Alfredo Santillán Marco Martos José Franco Jongsoo Kim Física, Astronomía y Matemáticas We discuss 2-D MHD numerical simulations for the interaction of high-velocit y clouds with a magnetized Galactic disk. The initial magnetic field is oriented parallel to the disk, and we consider two different field topologies: parallel and perpendicular to the plane of motion of the clouds. The impinging clouds move in oblique trajectories and fall toward the plane with different initial velocities. The B-field lines are distorted and compressed during the collision, preventing the cloud from penetrating into the disk. The perturbation creates a complex, turbulent, pattern of MHD waves that induce oscillations on both sides of the plane, and can trigger the Parker instability . The field efficiently transmits the perturbation over a large volume, while acting like a shield that inhibits the mass exchange between halo and disk. For non-magnetized disk cases, the shocked layer generates a tail that oscillates, creating vorticity and turbulent flows along its trajectory. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101122 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.11 |
| format | Artículo científico |
| id | redalyc_57101122 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | The Collisions of HVCs with a Magnetized Gaseous Galactic Disk Alfredo Santillán Física, Astronomía y Matemáticas The Collisions of HVCs with a Magnetized Gaseous Galactic Disk Alfredo Santillán Marco Martos José Franco Jongsoo Kim Física, Astronomía y Matemáticas We discuss 2-D MHD numerical simulations for the interaction of high-velocit y clouds with a magnetized Galactic disk. The initial magnetic field is oriented parallel to the disk, and we consider two different field topologies: parallel and perpendicular to the plane of motion of the clouds. The impinging clouds move in oblique trajectories and fall toward the plane with different initial velocities. The B-field lines are distorted and compressed during the collision, preventing the cloud from penetrating into the disk. The perturbation creates a complex, turbulent, pattern of MHD waves that induce oscillations on both sides of the plane, and can trigger the Parker instability . The field efficiently transmits the perturbation over a large volume, while acting like a shield that inhibits the mass exchange between halo and disk. For non-magnetized disk cases, the shocked layer generates a tail that oscillates, creating vorticity and turbulent flows along its trajectory. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101122 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.11 |
| title | The Collisions of HVCs with a Magnetized Gaseous Galactic Disk |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=57101122 |