The MHD collapsar model for GRBs: an Inflow produces an outflow
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2007
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| _version_ | 1876481969830756352 |
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| author | Daniel Proga |
| author_facet | Daniel Proga |
| contents | The MHD collapsar model for GRBs: an Inflow produces an outflow Daniel Proga Física, Astronomía y Matemáticas MHD outflows Accretion stars: winds accretion disks We present our recent results from numerical simulations of a magnetized ow in the vicinity of a black holein the context of the collapsar model for GRBs. The simulations show that after an initial transient, the flow settles into a complex convolution of several distinct, time-dependent flow components including an accretion torus, its corona and outflow, an inflow and an outow in the polar funnel. We focus on studying the nature and connection between these components, in particular between the inflows and related outflows. We find that rotational and MHD effects launch, accelerate, and sustain the outows. We also find that an outflow canbe formed even when the collapsing envelope has initially a very weak magnetic field and a very small angularmomentum. Our main conclusion is that even for a relatively weak initial magnetic field and a slow rotation,a gravitational collapse of a stellar envelope can lead to formation of a very strong and very fast jet. 2007 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57102707 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.27 |
| format | Artículo científico |
| id | redalyc_57102707 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | The MHD collapsar model for GRBs: an Inflow produces an outflow Daniel Proga Física, Astronomía y Matemáticas MHD outflows Accretion stars: winds accretion disks The MHD collapsar model for GRBs: an Inflow produces an outflow Daniel Proga Física, Astronomía y Matemáticas MHD outflows Accretion stars: winds accretion disks We present our recent results from numerical simulations of a magnetized ow in the vicinity of a black holein the context of the collapsar model for GRBs. The simulations show that after an initial transient, the flow settles into a complex convolution of several distinct, time-dependent flow components including an accretion torus, its corona and outflow, an inflow and an outow in the polar funnel. We focus on studying the nature and connection between these components, in particular between the inflows and related outflows. We find that rotational and MHD effects launch, accelerate, and sustain the outows. We also find that an outflow canbe formed even when the collapsing envelope has initially a very weak magnetic field and a very small angularmomentum. Our main conclusion is that even for a relatively weak initial magnetic field and a slow rotation,a gravitational collapse of a stellar envelope can lead to formation of a very strong and very fast jet. 2007 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57102707 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.27 |
| title | The MHD collapsar model for GRBs: an Inflow produces an outflow |
| topic | Física, Astronomía y Matemáticas MHD outflows Accretion stars: winds accretion disks |
| url | https://www.redalyc.org/articulo.oa?id=57102707 |