Newtonian limit of scalar-tensor theories and galactic dynamics: isolated and interacting galaxies
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| Format: | Artículo científico |
| Language: | en |
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Sociedad Mexicana de Física A.C.
2007
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| author | M. A. Rodríguez-Meza |
| author_facet | M. A. Rodríguez-Meza |
| contents | Newtonian limit of scalar-tensor theories and galactic dynamics: isolated and interacting galaxies M. A. Rodríguez-Meza J.L. Cervantes-Cota R. Gabbasov J. Klapp Física, Astronomía y Matemáticas scalar Bar formation tensor theory galaxy interaction We use the Newtonian limit of a general scalar-tensor theory around a background field to study astrophysical effects. The gravitationaltheory modifies the standard Newtonian potential by adding a Yukawa term to it, which is quantified by two theoretical parameters: ¸, thelenghtscale of the gravitational interaction and its strength, ®. Within this formalism we firstly present a numerical study on the formationof bars in isolated galaxies. We have found for positive ® that the modified gravity destabilizes the galactic discs and leads to rapid barformation in isolated galaxies. Values of ¸ in the range ¼ 8 14 kpc produce strongest bars in isolated models. Then, we extent this workby considering tidal effects due to interacting galaxies. We send two spirals to collide and study the bar properties of the remnant. Wecharacterize the bar kinematical properties in terms of our parameters (¸; ®). 2007 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57066405 https://www.redalyc.org/journal/570/57066405/ https://www.redalyc.org/journal/570/57066405/html/ https://www.redalyc.org/journal/570/57066405/57066405.epub https://www.redalyc.org/journal/570/57066405/movil en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.4 Vol.53 |
| format | Artículo científico |
| id | redalyc_57066405 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Sociedad Mexicana de Física A.C. |
| spellingShingle | Newtonian limit of scalar-tensor theories and galactic dynamics: isolated and interacting galaxies M. A. Rodríguez-Meza Física, Astronomía y Matemáticas scalar Bar formation tensor theory galaxy interaction Newtonian limit of scalar-tensor theories and galactic dynamics: isolated and interacting galaxies M. A. Rodríguez-Meza J.L. Cervantes-Cota R. Gabbasov J. Klapp Física, Astronomía y Matemáticas scalar Bar formation tensor theory galaxy interaction We use the Newtonian limit of a general scalar-tensor theory around a background field to study astrophysical effects. The gravitationaltheory modifies the standard Newtonian potential by adding a Yukawa term to it, which is quantified by two theoretical parameters: ¸, thelenghtscale of the gravitational interaction and its strength, ®. Within this formalism we firstly present a numerical study on the formationof bars in isolated galaxies. We have found for positive ® that the modified gravity destabilizes the galactic discs and leads to rapid barformation in isolated galaxies. Values of ¸ in the range ¼ 8 14 kpc produce strongest bars in isolated models. Then, we extent this workby considering tidal effects due to interacting galaxies. We send two spirals to collide and study the bar properties of the remnant. Wecharacterize the bar kinematical properties in terms of our parameters (¸; ®). 2007 artículo científico 0035-001X https://www.redalyc.org/articulo.oa?id=57066405 https://www.redalyc.org/journal/570/57066405/ https://www.redalyc.org/journal/570/57066405/html/ https://www.redalyc.org/journal/570/57066405/57066405.epub https://www.redalyc.org/journal/570/57066405/movil en http://www.redalyc.org/revista.oa?id=570 Revista Mexicana de Física application/pdf Sociedad Mexicana de Física A.C. Revista Mexicana de Física (México) Num.4 Vol.53 |
| title | Newtonian limit of scalar-tensor theories and galactic dynamics: isolated and interacting galaxies |
| topic | Física, Astronomía y Matemáticas scalar Bar formation tensor theory galaxy interaction |
| url | https://www.redalyc.org/articulo.oa?id=57066405 https://www.redalyc.org/journal/570/57066405/ https://www.redalyc.org/journal/570/57066405/html/ https://www.redalyc.org/journal/570/57066405/57066405.epub https://www.redalyc.org/journal/570/57066405/movil |