Rotation curve bifurcations as indicators of close recent galaxy encounters

Autores
Pedrosa, Susana Elizabeth; Tissera, Patricia Beatriz; Fuentes Carrera, I.; Mendez de Oliveira, Claudia
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. 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. Using simulations of major mergers in 3D, we study the time evolution of these asymmetries in a pair of galaxies, during the first passage. 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 ~ 0.5 Gyr h^-1, 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 fly-byes.
Fil: Pedrosa, Susana Elizabeth. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Tissera, Patricia Beatriz. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Fuentes Carrera, I.. Université Paris Diderot - Paris 7; Francia
Fil: Mendez de Oliveira, Claudia. Universidade de Sao Paulo; Brasil
Materia
galaxies: evolution
galaxies: interactions
galaxies: formation
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/24709
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Rotation curve bifurcations as indicators of close recent galaxy encountersPedrosa, Susana ElizabethTissera, Patricia BeatrizFuentes Carrera, I.Mendez de Oliveira, Claudiagalaxies: evolutiongalaxies: interactionsgalaxies: formationhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. 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. Using simulations of major mergers in 3D, we study the time evolution of these asymmetries in a pair of galaxies, during the first passage. 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 ~ 0.5 Gyr h^-1, 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 fly-byes.Fil: Pedrosa, Susana Elizabeth. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Tissera, Patricia Beatriz. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Fuentes Carrera, I.. Université Paris Diderot - Paris 7; FranciaFil: Mendez de Oliveira, Claudia. Universidade de Sao Paulo; BrasilEDP Sciences2008-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/24709Pedrosa, Susana Elizabeth; Tissera, Patricia Beatriz; Fuentes Carrera, I.; Mendez de Oliveira, Claudia; Rotation curve bifurcations as indicators of close recent galaxy encounters; EDP Sciences; Astronomy and Astrophysics; 484; 2; 12-2008; 299-3020004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20078318info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/23/aa8318-07/aa8318-07.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:33:50Zoai:ri.conicet.gov.ar:11336/24709instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:33:51.194CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Rotation curve bifurcations as indicators of close recent galaxy encounters
title Rotation curve bifurcations as indicators of close recent galaxy encounters
spellingShingle Rotation curve bifurcations as indicators of close recent galaxy encounters
Pedrosa, Susana Elizabeth
galaxies: evolution
galaxies: interactions
galaxies: formation
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
dc.creator.none.fl_str_mv Pedrosa, Susana Elizabeth
Tissera, Patricia Beatriz
Fuentes Carrera, I.
Mendez de Oliveira, Claudia
author Pedrosa, Susana Elizabeth
author_facet Pedrosa, Susana Elizabeth
Tissera, Patricia Beatriz
Fuentes Carrera, I.
Mendez de Oliveira, Claudia
author_role author
author2 Tissera, Patricia Beatriz
Fuentes Carrera, I.
Mendez de Oliveira, Claudia
author2_role author
author
author
dc.subject.none.fl_str_mv galaxies: evolution
galaxies: interactions
galaxies: formation
topic galaxies: evolution
galaxies: interactions
galaxies: formation
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. 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. Using simulations of major mergers in 3D, we study the time evolution of these asymmetries in a pair of galaxies, during the first passage. 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 ~ 0.5 Gyr h^-1, 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 fly-byes.
Fil: Pedrosa, Susana Elizabeth. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Tissera, Patricia Beatriz. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Fuentes Carrera, I.. Université Paris Diderot - Paris 7; Francia
Fil: Mendez de Oliveira, Claudia. Universidade de Sao Paulo; Brasil
description Rotation curves of interacting galaxies often show that velocities are either rising or falling in the direction of the companion galaxy. 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. Using simulations of major mergers in 3D, we study the time evolution of these asymmetries in a pair of galaxies, during the first passage. 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 ~ 0.5 Gyr h^-1, 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 fly-byes.
publishDate 2008
dc.date.none.fl_str_mv 2008-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/24709
Pedrosa, Susana Elizabeth; Tissera, Patricia Beatriz; Fuentes Carrera, I.; Mendez de Oliveira, Claudia; Rotation curve bifurcations as indicators of close recent galaxy encounters; EDP Sciences; Astronomy and Astrophysics; 484; 2; 12-2008; 299-302
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/24709
identifier_str_mv Pedrosa, Susana Elizabeth; Tissera, Patricia Beatriz; Fuentes Carrera, I.; Mendez de Oliveira, Claudia; Rotation curve bifurcations as indicators of close recent galaxy encounters; EDP Sciences; Astronomy and Astrophysics; 484; 2; 12-2008; 299-302
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20078318
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/23/aa8318-07/aa8318-07.html
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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