Explosions during galaxy formation
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2001
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| _version_ | 1876424459736317952 |
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| author | Hugo Martel |
| author_facet | Hugo Martel |
| contents | Explosions during galaxy formation Hugo Martel Paul R. Shapiro Física, Astronomía y Matemáticas HYDRODYNAMICS COSMOLOGY: THEORY GALAXIES: FORMATION INTERGALACTIC MEDIUM As an idealized model of the e ects of energy release by supernovae duringgalaxy formation, we consider an explosion at the center of a halo which forms atthe intersection of laments in the plane of a cosmological pancake by gravitationalinstability during pancake collapse. Such halos resemble the virialized objects foundin N{body simulations in a CDM universe and, therefore, serve as a convenient,scale{free test{bed model for galaxy formation. ASPH=P3M simulations reveal thatsuch explosions are anisotropic. The energy and metals are channeled into the lowdensity regions, away from the pancake plane. The pancake remains essentiallyundisturbed, even if the explosion is strong enough to blow away all the gas lo-cated inside the halo at the onset of the explosion and reheat the IGM surroundingthe pancake. Infall quickly replenishes this ejected gas and gradually restores thegas fraction as the halo mass continues to grow. Estimates of the collapse epochand SN energy{release for galaxies of di erent mass in the CDM model can re-late these results to scale{dependent questions of blow{out and blow{away andtheir implication for early IGM heating and metal enrichment and the creation ofdark{matter{dominated dwarf galaxies. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101025 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.10 |
| format | Artículo científico |
| id | redalyc_57101025 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Explosions during galaxy formation Hugo Martel Física, Astronomía y Matemáticas HYDRODYNAMICS COSMOLOGY: THEORY GALAXIES: FORMATION INTERGALACTIC MEDIUM Explosions during galaxy formation Hugo Martel Paul R. Shapiro Física, Astronomía y Matemáticas HYDRODYNAMICS COSMOLOGY: THEORY GALAXIES: FORMATION INTERGALACTIC MEDIUM As an idealized model of the e ects of energy release by supernovae duringgalaxy formation, we consider an explosion at the center of a halo which forms atthe intersection of laments in the plane of a cosmological pancake by gravitationalinstability during pancake collapse. Such halos resemble the virialized objects foundin N{body simulations in a CDM universe and, therefore, serve as a convenient,scale{free test{bed model for galaxy formation. ASPH=P3M simulations reveal thatsuch explosions are anisotropic. The energy and metals are channeled into the lowdensity regions, away from the pancake plane. The pancake remains essentiallyundisturbed, even if the explosion is strong enough to blow away all the gas lo-cated inside the halo at the onset of the explosion and reheat the IGM surroundingthe pancake. Infall quickly replenishes this ejected gas and gradually restores thegas fraction as the halo mass continues to grow. Estimates of the collapse epochand SN energy{release for galaxies of di erent mass in the CDM model can re-late these results to scale{dependent questions of blow{out and blow{away andtheir implication for early IGM heating and metal enrichment and the creation ofdark{matter{dominated dwarf galaxies. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101025 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.10 |
| title | Explosions during galaxy formation |
| topic | Física, Astronomía y Matemáticas HYDRODYNAMICS COSMOLOGY: THEORY GALAXIES: FORMATION INTERGALACTIC MEDIUM |
| url | https://www.redalyc.org/articulo.oa?id=57101025 |