Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models

Autores
Padilla, Nelson David; Salazar Albornoz, Salvador; Contreras, Sergio; Cora, Sofia Alejandra; Ruiz, Andrés Nicolás
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The angular momentum of galactic discs in semi-analytic models of galaxy formation is usually updated in time as material is accreted to the disc by adopting a constant dimensionless spin parameter and little attention is paid to the effects of accretion with misaligned angular momenta. These effects are the subject of this paper, where we adopt a Monte Carlo simulation for the changes in the direction of the angular momentum of a galaxy disc as it accretes matter based on accurate measurements from dark-matter haloes in the Millennium II simulation. In our semi-analytic model implementation, the flips seen in the dark-matter haloes are assumed to be the same for the cold baryons; however, we also assume that in the latter the flip also entails a difficulty for the disc to increase its angular momentum which causes the disc to become smaller relative to a no-flip case. This makes star formation to occur faster, especially in low-mass galaxies at all redshifts allowing galaxies to reach higher stellar masses faster. We adopt a new condition for the triggering of starbursts during mergers. As these produce the largest flips it is natural to adopt the disc instability criterion to evaluate the triggering of bursts in mergers instead of one based on mass ratios as in the original model. The new implementation reduces the average lifetimes of discs by a factor of ∼2, while still allowing old ages for the present-day discs of large spiral galaxies. It also provides a faster decline of star formation in massive galaxies and a better fit to the bright end of the luminosity function at z = 0.
Fil: Padilla, Nelson David. Pontificia Universidad Católica de Chile; Chile
Fil: Salazar Albornoz, Salvador. Max-planck-institut Fur Extraterrestrische Physik;
Fil: Contreras, Sergio. Pontificia Universidad Católica de Chile; Chile
Fil: Cora, Sofia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina
Fil: Ruiz, Andrés Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomia Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomia Teórica y Experimental; Argentina
Materia
Evolution of galaxies
Fundamental parameters of galaxies
Structure of galaxies
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:11336/35185
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Stochastic angular momentum slews and flips and their effect on discs in galaxy formation modelsPadilla, Nelson DavidSalazar Albornoz, SalvadorContreras, SergioCora, Sofia AlejandraRuiz, Andrés NicolásEvolution of galaxiesFundamental parameters of galaxiesStructure of galaxieshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The angular momentum of galactic discs in semi-analytic models of galaxy formation is usually updated in time as material is accreted to the disc by adopting a constant dimensionless spin parameter and little attention is paid to the effects of accretion with misaligned angular momenta. These effects are the subject of this paper, where we adopt a Monte Carlo simulation for the changes in the direction of the angular momentum of a galaxy disc as it accretes matter based on accurate measurements from dark-matter haloes in the Millennium II simulation. In our semi-analytic model implementation, the flips seen in the dark-matter haloes are assumed to be the same for the cold baryons; however, we also assume that in the latter the flip also entails a difficulty for the disc to increase its angular momentum which causes the disc to become smaller relative to a no-flip case. This makes star formation to occur faster, especially in low-mass galaxies at all redshifts allowing galaxies to reach higher stellar masses faster. We adopt a new condition for the triggering of starbursts during mergers. As these produce the largest flips it is natural to adopt the disc instability criterion to evaluate the triggering of bursts in mergers instead of one based on mass ratios as in the original model. The new implementation reduces the average lifetimes of discs by a factor of ∼2, while still allowing old ages for the present-day discs of large spiral galaxies. It also provides a faster decline of star formation in massive galaxies and a better fit to the bright end of the luminosity function at z = 0.Fil: Padilla, Nelson David. Pontificia Universidad Católica de Chile; ChileFil: Salazar Albornoz, Salvador. Max-planck-institut Fur Extraterrestrische Physik;Fil: Contreras, Sergio. Pontificia Universidad Católica de Chile; ChileFil: Cora, Sofia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; ArgentinaFil: Ruiz, Andrés Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomia Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomia Teórica y Experimental; ArgentinaWiley Blackwell Publishing, Inc2014-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/35185Padilla, Nelson David; Salazar Albornoz, Salvador; Contreras, Sergio; Cora, Sofia Alejandra; Ruiz, Andrés Nicolás; Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 443; 8-2014; 2801-28140035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://mnras.oxfordjournals.org/content/443/3/2801.full.pdfinfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu1321info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:43:53Zoai:ri.conicet.gov.ar:11336/35185instacron: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 11:43:53.46CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models
title Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models
spellingShingle Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models
Padilla, Nelson David
Evolution of galaxies
Fundamental parameters of galaxies
Structure of galaxies
title_short Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models
title_full Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models
title_fullStr Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models
title_full_unstemmed Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models
title_sort Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models
dc.creator.none.fl_str_mv Padilla, Nelson David
Salazar Albornoz, Salvador
Contreras, Sergio
Cora, Sofia Alejandra
Ruiz, Andrés Nicolás
author Padilla, Nelson David
author_facet Padilla, Nelson David
Salazar Albornoz, Salvador
Contreras, Sergio
Cora, Sofia Alejandra
Ruiz, Andrés Nicolás
author_role author
author2 Salazar Albornoz, Salvador
Contreras, Sergio
Cora, Sofia Alejandra
Ruiz, Andrés Nicolás
author2_role author
author
author
author
dc.subject.none.fl_str_mv Evolution of galaxies
Fundamental parameters of galaxies
Structure of galaxies
topic Evolution of galaxies
Fundamental parameters of galaxies
Structure of galaxies
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The angular momentum of galactic discs in semi-analytic models of galaxy formation is usually updated in time as material is accreted to the disc by adopting a constant dimensionless spin parameter and little attention is paid to the effects of accretion with misaligned angular momenta. These effects are the subject of this paper, where we adopt a Monte Carlo simulation for the changes in the direction of the angular momentum of a galaxy disc as it accretes matter based on accurate measurements from dark-matter haloes in the Millennium II simulation. In our semi-analytic model implementation, the flips seen in the dark-matter haloes are assumed to be the same for the cold baryons; however, we also assume that in the latter the flip also entails a difficulty for the disc to increase its angular momentum which causes the disc to become smaller relative to a no-flip case. This makes star formation to occur faster, especially in low-mass galaxies at all redshifts allowing galaxies to reach higher stellar masses faster. We adopt a new condition for the triggering of starbursts during mergers. As these produce the largest flips it is natural to adopt the disc instability criterion to evaluate the triggering of bursts in mergers instead of one based on mass ratios as in the original model. The new implementation reduces the average lifetimes of discs by a factor of ∼2, while still allowing old ages for the present-day discs of large spiral galaxies. It also provides a faster decline of star formation in massive galaxies and a better fit to the bright end of the luminosity function at z = 0.
Fil: Padilla, Nelson David. Pontificia Universidad Católica de Chile; Chile
Fil: Salazar Albornoz, Salvador. Max-planck-institut Fur Extraterrestrische Physik;
Fil: Contreras, Sergio. Pontificia Universidad Católica de Chile; Chile
Fil: Cora, Sofia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina
Fil: Ruiz, Andrés Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomia Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomia Teórica y Experimental; Argentina
description The angular momentum of galactic discs in semi-analytic models of galaxy formation is usually updated in time as material is accreted to the disc by adopting a constant dimensionless spin parameter and little attention is paid to the effects of accretion with misaligned angular momenta. These effects are the subject of this paper, where we adopt a Monte Carlo simulation for the changes in the direction of the angular momentum of a galaxy disc as it accretes matter based on accurate measurements from dark-matter haloes in the Millennium II simulation. In our semi-analytic model implementation, the flips seen in the dark-matter haloes are assumed to be the same for the cold baryons; however, we also assume that in the latter the flip also entails a difficulty for the disc to increase its angular momentum which causes the disc to become smaller relative to a no-flip case. This makes star formation to occur faster, especially in low-mass galaxies at all redshifts allowing galaxies to reach higher stellar masses faster. We adopt a new condition for the triggering of starbursts during mergers. As these produce the largest flips it is natural to adopt the disc instability criterion to evaluate the triggering of bursts in mergers instead of one based on mass ratios as in the original model. The new implementation reduces the average lifetimes of discs by a factor of ∼2, while still allowing old ages for the present-day discs of large spiral galaxies. It also provides a faster decline of star formation in massive galaxies and a better fit to the bright end of the luminosity function at z = 0.
publishDate 2014
dc.date.none.fl_str_mv 2014-08
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/11336/35185
Padilla, Nelson David; Salazar Albornoz, Salvador; Contreras, Sergio; Cora, Sofia Alejandra; Ruiz, Andrés Nicolás; Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 443; 8-2014; 2801-2814
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/35185
identifier_str_mv Padilla, Nelson David; Salazar Albornoz, Salvador; Contreras, Sergio; Cora, Sofia Alejandra; Ruiz, Andrés Nicolás; Stochastic angular momentum slews and flips and their effect on discs in galaxy formation models; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 443; 8-2014; 2801-2814
0035-8711
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://mnras.oxfordjournals.org/content/443/3/2801.full.pdf
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stu1321
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
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
publisher.none.fl_str_mv Wiley Blackwell Publishing, Inc
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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