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Abstract:

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.

Registro:

Documento: Artículo
Título:Rotation curve bifurcations as indicators of close recent galaxy encounters
Autor:Pedrosa, S.; Tissera, P.B.; Fuentes-Carrera, I.; De Oliveira, C.M.
Filiación:Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET, Argentina
Instituto de Astronomía y Física Del Espacio, Casilla de Correos 67, Suc. 28, 1428 Buenos Aires, Argentina
GEPI, Observatoire de Paris, Université Paris Diderot, Place Jules Janssen, 92190 Meudon, France
Universidade de São Paulo, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Cidade Universitária, Rua do Matão 1226, 05508-900 São Paulo SP, Brazil
Palabras clave:Galaxies: interactions; Galaxies: spiral; Galaxy: kinematics and dynamics; Bifurcation (mathematics); Computer simulation; Curve fitting; Space research; Galaxies: interactions; Galaxies: spiral; Galaxies
Año:2008
Volumen:484
Número:2
Página de inicio:299
Página de fin:302
DOI: http://dx.doi.org/10.1051/0004-6361:20078318
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v484_n2_p299_Pedrosa

Referencias:

  • Barton, E.J., Bromley, B.C., Geller, M.J., (1999) ApJ, 511, p. 25
  • Chengalur, J.N., Salpeter, E.E., Terzian, Y., (1984) AJ, 107
  • Dale, D.A., Giovanelli, R., Haynes, M.P., (2001) AJ, 121, p. 1886
  • Elmegreen, D., Elmegreen, B.G., (1990) ApJ, 364, p. 412
  • Fuentes Carrera, I., Rosado, M., Amram, P., (2004) A&A, 415, p. 451
  • Garrido, O., Marcelin, M., Amram, P., (2005) MNRAS, 362, p. 127
  • Kronberger, T., Kapferer, W., Schindler, S., (2006) A&A, 458, p. 69
  • Hernandez, T.H., Fuentes Carrera, I., Rosado, M., (2003) A&A, 412, p. 669
  • Hernquist, L., (1990) ApJ, 356, p. 359
  • Marquez, I., Masegosa, J., Moles, M., (2002) A&A, 393, p. 389
  • Mendes de Oliveira, C., Amram, P., Plana, H., Balkowski, C., (2003) AJ, 126, p. 2635
  • Navarro, J., Frenk, C.S., White, S., (1996) ApJ, 462, p. 563
  • Rubin, V.C., Ford, W.K., (1983) ApJ, 271, p. 556
  • Rubin, V.C., Hunter, D.A., Ford, W.K., (1991) ApJS, 76, p. 153
  • Scannapieco, C., Tissera, P.B., White, S.D.M., Springel, V., (2005) MNRAS, 364, p. 552
  • Salo, H., Laurikainen, E., (2000) MNRAS, 319, p. 377
  • Scannapieco, C., Tissera, P.B., White, S.D.M., Springel, V., (2006) MNRAS, 371, p. 1125
  • Springel, V., (2005) MNRAS, 364, p. 1105
  • Springel, V., Di Matteo, T., Hernquist, L., (2005) MNRAS, 361, p. 776
  • Toomre, A., Toomre, J., (1972) ApJ, 178, p. 623

Citas:

---------- APA ----------
Pedrosa, S., Tissera, P.B., Fuentes-Carrera, I. & De Oliveira, C.M. (2008) . Rotation curve bifurcations as indicators of close recent galaxy encounters. Astronomy and Astrophysics, 484(2), 299-302.
http://dx.doi.org/10.1051/0004-6361:20078318
---------- CHICAGO ----------
Pedrosa, S., Tissera, P.B., Fuentes-Carrera, I., De Oliveira, C.M. "Rotation curve bifurcations as indicators of close recent galaxy encounters" . Astronomy and Astrophysics 484, no. 2 (2008) : 299-302.
http://dx.doi.org/10.1051/0004-6361:20078318
---------- MLA ----------
Pedrosa, S., Tissera, P.B., Fuentes-Carrera, I., De Oliveira, C.M. "Rotation curve bifurcations as indicators of close recent galaxy encounters" . Astronomy and Astrophysics, vol. 484, no. 2, 2008, pp. 299-302.
http://dx.doi.org/10.1051/0004-6361:20078318
---------- VANCOUVER ----------
Pedrosa, S., Tissera, P.B., Fuentes-Carrera, I., De Oliveira, C.M. Rotation curve bifurcations as indicators of close recent galaxy encounters. Astron. Astrophys. 2008;484(2):299-302.
http://dx.doi.org/10.1051/0004-6361:20078318