Artículo
Abstract:
We report results on the formation of disklike structures in two cosmological hydrodynamical simulations, which share the same initial conditions, in a hierarchical clustering scenario. In the first simulation, a simple and generic implementation of star formation has allowed galaxy-like objects with stellar bulges and extended, populated disks to form. Gas in the disk comes both from particles that survive mergers, keeping in part their angular momentum content, and from new gas supplied by infall once the merger process is over, with global specific angular momentum conservation. The stellar bulge forms from gas that has lost most of its angular momentum. In the second simulation, no star formation has been included. In this case, objects consist of an overpopulated central gas concentration and an extended, underpopulated disk. The central concentration forms from particles that suffer an important angular momentum loss in violent events, and it often contains more than 70% of the object's baryonic mass. The external disk forms by late infall of gas that roughly conserves its specific angular momentum. The difference between these two simulations is likely to be due to the stabilizing character of the stellar bulge-like cores that form in the first simulation, which diminishes the inflow of gas triggered by mergers and interactions. © 1998. The American Astronomical Society. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Disk formation in hierarchical hydrodynamical simulations: A way out of the angular momentum catastrophe |
| Autor: | Domínguez-Tenreiro, R.; Tissera, P.B.; Sáiz, A. |
| Filiación: | Departament de Física Teórica C-XI, Universidad Autónoma de Madrid, E-28049 Cantoblanco, Madrid, Spain Imperial College of Science, Technology and Medicine, London, United Kingdom IAFE, Casilla de Correos 67, Suc. 28, 1428 Buenos Aires, Argentina |
| Palabras clave: | Cosmology: observations; Cosmology: theory; Dark matter; Galaxies: formation; Methods: numerical |
| Año: | 1998 |
| Volumen: | 508 |
| Número: | 2 PART II |
| Página de inicio: | L123 |
| Página de fin: | L127 |
| Título revista: | Astrophysical Journal |
| Título revista abreviado: | Astrophys. J. |
| ISSN: | 0004637X |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v508_n2PARTII_pL123_DominguezTenreiro |
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Citas:
---------- APA ----------
Domínguez-Tenreiro, R., Tissera, P.B. & Sáiz, A. (1998) . Disk formation in hierarchical hydrodynamical simulations: A way out of the angular momentum catastrophe. Astrophysical Journal, 508(2 PART II), L123-L127.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v508_n2PARTII_pL123_DominguezTenreiro [ ]
---------- CHICAGO ----------
Domínguez-Tenreiro, R., Tissera, P.B., Sáiz, A. "Disk formation in hierarchical hydrodynamical simulations: A way out of the angular momentum catastrophe" . Astrophysical Journal 508, no. 2 PART II (1998) : L123-L127.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v508_n2PARTII_pL123_DominguezTenreiro [ ]
---------- MLA ----------
Domínguez-Tenreiro, R., Tissera, P.B., Sáiz, A. "Disk formation in hierarchical hydrodynamical simulations: A way out of the angular momentum catastrophe" . Astrophysical Journal, vol. 508, no. 2 PART II, 1998, pp. L123-L127.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v508_n2PARTII_pL123_DominguezTenreiro [ ]
---------- VANCOUVER ----------
Domínguez-Tenreiro, R., Tissera, P.B., Sáiz, A. Disk formation in hierarchical hydrodynamical simulations: A way out of the angular momentum catastrophe. Astrophys. J. 1998;508(2 PART II):L123-L127.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v508_n2PARTII_pL123_DominguezTenreiro [ ]
