Superbubbles vs Super-galactic winds
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2003
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| author | Sergey Silich |
| author_facet | Sergey Silich |
| contents | Superbubbles vs Super-galactic winds Sergey Silich Guillermo Tenorio Casiana Muñoz Física, Astronomía y Matemáticas Outflows Hydrodynamics Stars : Winds ISM : Bubbles ISM: Abundances Here we stress some of the major differences between supergalactic winds and giant superbubbles evolving into the giant low density haloes of galaxies. Both events are the result of massive bursts of star formation within the densest regions of the host galaxies. However, supergalactic winds are able to channel the metals produced by the recent burst straight into the intergalactic medium while superbubbles fail to reach the outskirts of the host galaxies and thus retain the newly processed metals and with them eventually raise the abundance of their ISM. We review the properties of major bursts of star formation and the critical energy (and mass of the starburst) required for mass ejection both in the case of an ISM strongly attened by rotation into a thin disk and that imposed by a more extended ISM distribution arising from a smaller rotation. The limits are thus establish for galaxies with an ISM mass in the range 106 M๏ to more than 109 M๏, and are compared with asample of local galaxies. Some of these galaxies seem to be above the critical limit despite the fact that their structure is clearly that of a superbubble. True supergalactic winds, as evidence by M82, are shown to exceed the critical limit by more than an order of magnitude and thus the limit derived by Silich & Tenorio-Tagle (2001) for mass ejection should be regarded as a lower limit. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101835 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.18 |
| format | Artículo científico |
| id | redalyc_57101835 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Superbubbles vs Super-galactic winds Sergey Silich Física, Astronomía y Matemáticas Outflows Hydrodynamics Stars : Winds ISM : Bubbles ISM: Abundances Superbubbles vs Super-galactic winds Sergey Silich Guillermo Tenorio Casiana Muñoz Física, Astronomía y Matemáticas Outflows Hydrodynamics Stars : Winds ISM : Bubbles ISM: Abundances Here we stress some of the major differences between supergalactic winds and giant superbubbles evolving into the giant low density haloes of galaxies. Both events are the result of massive bursts of star formation within the densest regions of the host galaxies. However, supergalactic winds are able to channel the metals produced by the recent burst straight into the intergalactic medium while superbubbles fail to reach the outskirts of the host galaxies and thus retain the newly processed metals and with them eventually raise the abundance of their ISM. We review the properties of major bursts of star formation and the critical energy (and mass of the starburst) required for mass ejection both in the case of an ISM strongly attened by rotation into a thin disk and that imposed by a more extended ISM distribution arising from a smaller rotation. The limits are thus establish for galaxies with an ISM mass in the range 106 M๏ to more than 109 M๏, and are compared with asample of local galaxies. Some of these galaxies seem to be above the critical limit despite the fact that their structure is clearly that of a superbubble. True supergalactic winds, as evidence by M82, are shown to exceed the critical limit by more than an order of magnitude and thus the limit derived by Silich & Tenorio-Tagle (2001) for mass ejection should be regarded as a lower limit. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101835 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.18 |
| title | Superbubbles vs Super-galactic winds |
| topic | Física, Astronomía y Matemáticas Outflows Hydrodynamics Stars : Winds ISM : Bubbles ISM: Abundances |
| url | https://www.redalyc.org/articulo.oa?id=57101835 |