Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations

Autores
Biaus, Luis; Nuza, Sebastian Ernesto; Scannapieco, Cecilia; Richter, P.; Damle, M.; Libeskind, Noam I.; Vogelsberger, M.
Año de publicación
2026
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present a study of the gas kinematics within the HESTIA project, a state-of-the-art set of simulations of the Local Group, with a particular focus on the velocity patterns of different ions and the large-scale motion of gas and galaxies towards the Local Group´s barycentre. Using two of the HESTIA high-resolution runs, we examined the distribution and velocities of H I, C IV, Si III, O VI, O VII, and O VIII and their imprints on sightlines observed from the Sun´s location in different reference frames. To mimic observational strategies, we assessed the contribution of rotating disc gas, assuming simple kinematic and geometrical considerations. Our results indicate that local absorption features in observed sightlines most likely trace material in the circumgalactic medium of the Milky Way. Some sightlines, however, show that intragroup material could be more easily observed towards the barycentre, which defines a preferred direction in the sky. In particular, H I, Si III, and C IV roughly trace cold gas inside Milky Way and Andromeda haloes, as most of their mass flux occurs within the virial region of each galaxy, while oxygen high ions mostly trace hot halo and intragroup gas, with comparable mass fluxes in the Local Group outskirts and the circumgalactic medium of the two main galaxies. Additionally, we find that pressures traced by different ionic species outside the Milky Way´s halo show systematically higher values towards the barycentre direction in contrast to its antipode in the sky. Kinematic imprints of the global motion towards the barycentre can be seen at larger distances for all ionic species as the Milky Way rams into material in the direction of Andromeda, with gas towards the anti-barycentre lagging behind.
Fil: Biaus, Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
Fil: Nuza, Sebastian Ernesto. Consejo Nacional de Investigaciones 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: Scannapieco, Cecilia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Richter, P.. Universitat Potsdam. Mathematisch Nautrwissenschaften Fakultat; Alemania
Fil: Damle, M.. New York University Abu Dhabi; Emiratos Árabes Unidos
Fil: Libeskind, Noam I.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Vogelsberger, M.. Kavli Institute For Astrophysics And Space Research; Estados Unidos
Materia
GALAXIES: KINEMATICS AND DYNAMICS
LOCAL GROUP
ASTROPHYSICS OF GALAXIES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/287722
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulationsBiaus, LuisNuza, Sebastian ErnestoScannapieco, CeciliaRichter, P.Damle, M.Libeskind, Noam I.Vogelsberger, M.GALAXIES: KINEMATICS AND DYNAMICSLOCAL GROUPASTROPHYSICS OF GALAXIEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present a study of the gas kinematics within the HESTIA project, a state-of-the-art set of simulations of the Local Group, with a particular focus on the velocity patterns of different ions and the large-scale motion of gas and galaxies towards the Local Group´s barycentre. Using two of the HESTIA high-resolution runs, we examined the distribution and velocities of H I, C IV, Si III, O VI, O VII, and O VIII and their imprints on sightlines observed from the Sun´s location in different reference frames. To mimic observational strategies, we assessed the contribution of rotating disc gas, assuming simple kinematic and geometrical considerations. Our results indicate that local absorption features in observed sightlines most likely trace material in the circumgalactic medium of the Milky Way. Some sightlines, however, show that intragroup material could be more easily observed towards the barycentre, which defines a preferred direction in the sky. In particular, H I, Si III, and C IV roughly trace cold gas inside Milky Way and Andromeda haloes, as most of their mass flux occurs within the virial region of each galaxy, while oxygen high ions mostly trace hot halo and intragroup gas, with comparable mass fluxes in the Local Group outskirts and the circumgalactic medium of the two main galaxies. Additionally, we find that pressures traced by different ionic species outside the Milky Way´s halo show systematically higher values towards the barycentre direction in contrast to its antipode in the sky. Kinematic imprints of the global motion towards the barycentre can be seen at larger distances for all ionic species as the Milky Way rams into material in the direction of Andromeda, with gas towards the anti-barycentre lagging behind.Fil: Biaus, Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaFil: Nuza, Sebastian Ernesto. Consejo Nacional de Investigaciones 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: Scannapieco, Cecilia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Richter, P.. Universitat Potsdam. Mathematisch Nautrwissenschaften Fakultat; AlemaniaFil: Damle, M.. New York University Abu Dhabi; Emiratos Árabes UnidosFil: Libeskind, Noam I.. Leibniz Institut Fuer Astrophysik Potsdam; AlemaniaFil: Vogelsberger, M.. Kavli Institute For Astrophysics And Space Research; Estados UnidosEDP Sciences2026-02info: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/11336/287722Biaus, Luis; Nuza, Sebastian Ernesto; Scannapieco, Cecilia; Richter, P.; Damle, M.; et al.; Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations; EDP Sciences; Astronomy and Astrophysics; 706; 2-2026; 1-150004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/10.1051/0004-6361/202555861info:eu-repo/semantics/altIdentifier/doi/1051/0004-6361/202555861info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-08-25T14:36:41Zoai:ri.conicet.gov.ar:11336/287722instacron: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:34982026-08-25 14:36:41.762CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations
title Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations
spellingShingle Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations
Biaus, Luis
GALAXIES: KINEMATICS AND DYNAMICS
LOCAL GROUP
ASTROPHYSICS OF GALAXIES
title_short Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations
title_full Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations
title_fullStr Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations
title_full_unstemmed Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations
title_sort Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations
dc.creator.none.fl_str_mv Biaus, Luis
Nuza, Sebastian Ernesto
Scannapieco, Cecilia
Richter, P.
Damle, M.
Libeskind, Noam I.
Vogelsberger, M.
author Biaus, Luis
author_facet Biaus, Luis
Nuza, Sebastian Ernesto
Scannapieco, Cecilia
Richter, P.
Damle, M.
Libeskind, Noam I.
Vogelsberger, M.
author_role author
author2 Nuza, Sebastian Ernesto
Scannapieco, Cecilia
Richter, P.
Damle, M.
Libeskind, Noam I.
Vogelsberger, M.
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv GALAXIES: KINEMATICS AND DYNAMICS
LOCAL GROUP
ASTROPHYSICS OF GALAXIES
topic GALAXIES: KINEMATICS AND DYNAMICS
LOCAL GROUP
ASTROPHYSICS 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 We present a study of the gas kinematics within the HESTIA project, a state-of-the-art set of simulations of the Local Group, with a particular focus on the velocity patterns of different ions and the large-scale motion of gas and galaxies towards the Local Group´s barycentre. Using two of the HESTIA high-resolution runs, we examined the distribution and velocities of H I, C IV, Si III, O VI, O VII, and O VIII and their imprints on sightlines observed from the Sun´s location in different reference frames. To mimic observational strategies, we assessed the contribution of rotating disc gas, assuming simple kinematic and geometrical considerations. Our results indicate that local absorption features in observed sightlines most likely trace material in the circumgalactic medium of the Milky Way. Some sightlines, however, show that intragroup material could be more easily observed towards the barycentre, which defines a preferred direction in the sky. In particular, H I, Si III, and C IV roughly trace cold gas inside Milky Way and Andromeda haloes, as most of their mass flux occurs within the virial region of each galaxy, while oxygen high ions mostly trace hot halo and intragroup gas, with comparable mass fluxes in the Local Group outskirts and the circumgalactic medium of the two main galaxies. Additionally, we find that pressures traced by different ionic species outside the Milky Way´s halo show systematically higher values towards the barycentre direction in contrast to its antipode in the sky. Kinematic imprints of the global motion towards the barycentre can be seen at larger distances for all ionic species as the Milky Way rams into material in the direction of Andromeda, with gas towards the anti-barycentre lagging behind.
Fil: Biaus, Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
Fil: Nuza, Sebastian Ernesto. Consejo Nacional de Investigaciones 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: Scannapieco, Cecilia. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Richter, P.. Universitat Potsdam. Mathematisch Nautrwissenschaften Fakultat; Alemania
Fil: Damle, M.. New York University Abu Dhabi; Emiratos Árabes Unidos
Fil: Libeskind, Noam I.. Leibniz Institut Fuer Astrophysik Potsdam; Alemania
Fil: Vogelsberger, M.. Kavli Institute For Astrophysics And Space Research; Estados Unidos
description We present a study of the gas kinematics within the HESTIA project, a state-of-the-art set of simulations of the Local Group, with a particular focus on the velocity patterns of different ions and the large-scale motion of gas and galaxies towards the Local Group´s barycentre. Using two of the HESTIA high-resolution runs, we examined the distribution and velocities of H I, C IV, Si III, O VI, O VII, and O VIII and their imprints on sightlines observed from the Sun´s location in different reference frames. To mimic observational strategies, we assessed the contribution of rotating disc gas, assuming simple kinematic and geometrical considerations. Our results indicate that local absorption features in observed sightlines most likely trace material in the circumgalactic medium of the Milky Way. Some sightlines, however, show that intragroup material could be more easily observed towards the barycentre, which defines a preferred direction in the sky. In particular, H I, Si III, and C IV roughly trace cold gas inside Milky Way and Andromeda haloes, as most of their mass flux occurs within the virial region of each galaxy, while oxygen high ions mostly trace hot halo and intragroup gas, with comparable mass fluxes in the Local Group outskirts and the circumgalactic medium of the two main galaxies. Additionally, we find that pressures traced by different ionic species outside the Milky Way´s halo show systematically higher values towards the barycentre direction in contrast to its antipode in the sky. Kinematic imprints of the global motion towards the barycentre can be seen at larger distances for all ionic species as the Milky Way rams into material in the direction of Andromeda, with gas towards the anti-barycentre lagging behind.
publishDate 2026
dc.date.none.fl_str_mv 2026-02
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/11336/287722
Biaus, Luis; Nuza, Sebastian Ernesto; Scannapieco, Cecilia; Richter, P.; Damle, M.; et al.; Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations; EDP Sciences; Astronomy and Astrophysics; 706; 2-2026; 1-15
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/287722
identifier_str_mv Biaus, Luis; Nuza, Sebastian Ernesto; Scannapieco, Cecilia; Richter, P.; Damle, M.; et al.; Probing the kinematics of the Local Group with chemically enriched gas in the HESTIA simulations; EDP Sciences; Astronomy and Astrophysics; 706; 2-2026; 1-15
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/url/https://www.aanda.org/10.1051/0004-6361/202555861
info:eu-repo/semantics/altIdentifier/doi/1051/0004-6361/202555861
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/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 13.365483

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