Rotation curve bifurcations as indicators of close recent galaxy encounters
Context: Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. Aims: We seek to reproduce and analyse these features in the rotation curves of simulated equal-mass galaxies suffering a one-to-one encounter as possibl...
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2008
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v484_n2_p299_Pedrosa http://hdl.handle.net/20.500.12110/paper_00046361_v484_n2_p299_Pedrosa |
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paper:paper_00046361_v484_n2_p299_Pedrosa |
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paper:paper_00046361_v484_n2_p299_Pedrosa2023-06-08T14:27:46Z Rotation curve bifurcations as indicators of close recent galaxy encounters Galaxies: interactions Galaxies: spiral Galaxy: kinematics and dynamics Bifurcation (mathematics) Computer simulation Curve fitting Space research Galaxies: interactions Galaxies: spiral Galaxies Context: Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. Aims: We seek to reproduce and analyse these features in the rotation curves of simulated equal-mass galaxies suffering a one-to-one encounter as possible indicators of close encounters. Methods: Using simulations of major mergers in 3D, we study the time evolution of these asymmetries in a pair of galaxies during the first passage. Results: Our main results are: (a) the rotation curve asymmetries appear right at pericentre of the first passage, (b) the significant disturbed rotation velocities occur within a small time interval, of , and, therefore, the presence of bifurcation in the velocity curve could be used as an indicator of the pericentre occurrence. These results are in qualitative agreement with previous findings for minor mergers and flybys. © 2008 ESO. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v484_n2_p299_Pedrosa http://hdl.handle.net/20.500.12110/paper_00046361_v484_n2_p299_Pedrosa |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Galaxies: interactions Galaxies: spiral Galaxy: kinematics and dynamics Bifurcation (mathematics) Computer simulation Curve fitting Space research Galaxies: interactions Galaxies: spiral Galaxies |
| spellingShingle |
Galaxies: interactions Galaxies: spiral Galaxy: kinematics and dynamics Bifurcation (mathematics) Computer simulation Curve fitting Space research Galaxies: interactions Galaxies: spiral Galaxies Rotation curve bifurcations as indicators of close recent galaxy encounters |
| topic_facet |
Galaxies: interactions Galaxies: spiral Galaxy: kinematics and dynamics Bifurcation (mathematics) Computer simulation Curve fitting Space research Galaxies: interactions Galaxies: spiral Galaxies |
| description |
Context: Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. Aims: We seek to reproduce and analyse these features in the rotation curves of simulated equal-mass galaxies suffering a one-to-one encounter as possible indicators of close encounters. Methods: Using simulations of major mergers in 3D, we study the time evolution of these asymmetries in a pair of galaxies during the first passage. Results: Our main results are: (a) the rotation curve asymmetries appear right at pericentre of the first passage, (b) the significant disturbed rotation velocities occur within a small time interval, of , and, therefore, the presence of bifurcation in the velocity curve could be used as an indicator of the pericentre occurrence. These results are in qualitative agreement with previous findings for minor mergers and flybys. © 2008 ESO. |
| title |
Rotation curve bifurcations as indicators of close recent galaxy encounters |
| title_short |
Rotation curve bifurcations as indicators of close recent galaxy encounters |
| title_full |
Rotation curve bifurcations as indicators of close recent galaxy encounters |
| title_fullStr |
Rotation curve bifurcations as indicators of close recent galaxy encounters |
| title_full_unstemmed |
Rotation curve bifurcations as indicators of close recent galaxy encounters |
| title_sort |
rotation curve bifurcations as indicators of close recent galaxy encounters |
| publishDate |
2008 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v484_n2_p299_Pedrosa http://hdl.handle.net/20.500.12110/paper_00046361_v484_n2_p299_Pedrosa |
| _version_ |
1768544575435046912 |