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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/35185
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T10:13:53Zoai: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:34982025-09-29 10:13:54.141CONICET 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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13.070432 |