The dark matter halo of NGC 1399: CDM or MOND?

Autores
Richtler, T.; Schuberth, Y.; Hilker, M.; Dirsch, B.; Bassino, Lilia Patricia; Romanowsky, A. J.
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Central galaxies in galaxy clusters may be key discriminants in the competition between the cold dark matter (CDM) paradigm and modified Newtonian dynamics (MOND). Aims. We investigate the dark halo of NGC 1399, the central galaxy of the Fornax cluster, out to a galactocentric distance of 80 kpc. Methods. The data base consists of 656 radial velocities of globular clusters obtained with MXU/VLT and GMOS/Gemini, which is the largest sample so far for any galaxy. We performed a Jeans analysis for a non-rotating isotropic model. Results. An NFW halo with the parameters rs = 50 kpc and s = 0.0065 M/pc3 provides a good description of our data, fitting well to the X-ray mass. More massive halos are also permitted that agree with the mass of the Fornax cluster as derived from galaxy velocities. We compare this halo with the expected MOND models under isotropy and find that additional dark matter on the order of the stellar mass is needed to get agreement. A fully radial infinite globular cluster system would be needed to change this conclusion. Conclusions. Regarding CDM, we cannot draw firm conclusions. To really constrain a cluster wide halo, more data covering a larger radius are necessary. The MOND result appears as a small-scale variant of the finding that MOND in galaxy clusters still needs dark matter.
Fil: Richtler, T.. Universidad de Concepción; Chile
Fil: Schuberth, Y.. Universidad de Concepción; Chile
Fil: Hilker, M.. European Southern Observatory; Alemania
Fil: Dirsch, B.. Universidad de Concepción; Chile
Fil: Bassino, Lilia Patricia. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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: Romanowsky, A. J.. Universidad de Concepción; Chile
Materia
Elliptical galaxies
Kinematics
KINEMATICS
NGC 1399 (galaxia)
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:11336/44106
Acceder
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network_name_str CONICET Digital (CONICET)
spelling The dark matter halo of NGC 1399: CDM or MOND?Richtler, T.Schuberth, Y.Hilker, M.Dirsch, B.Bassino, Lilia PatriciaRomanowsky, A. J.Elliptical galaxiesKinematicsKINEMATICSNGC 1399 (galaxia)https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context. Central galaxies in galaxy clusters may be key discriminants in the competition between the cold dark matter (CDM) paradigm and modified Newtonian dynamics (MOND). Aims. We investigate the dark halo of NGC 1399, the central galaxy of the Fornax cluster, out to a galactocentric distance of 80 kpc. Methods. The data base consists of 656 radial velocities of globular clusters obtained with MXU/VLT and GMOS/Gemini, which is the largest sample so far for any galaxy. We performed a Jeans analysis for a non-rotating isotropic model. Results. An NFW halo with the parameters rs = 50 kpc and s = 0.0065 M/pc3 provides a good description of our data, fitting well to the X-ray mass. More massive halos are also permitted that agree with the mass of the Fornax cluster as derived from galaxy velocities. We compare this halo with the expected MOND models under isotropy and find that additional dark matter on the order of the stellar mass is needed to get agreement. A fully radial infinite globular cluster system would be needed to change this conclusion. Conclusions. Regarding CDM, we cannot draw firm conclusions. To really constrain a cluster wide halo, more data covering a larger radius are necessary. The MOND result appears as a small-scale variant of the finding that MOND in galaxy clusters still needs dark matter.Fil: Richtler, T.. Universidad de Concepción; ChileFil: Schuberth, Y.. Universidad de Concepción; ChileFil: Hilker, M.. European Southern Observatory; AlemaniaFil: Dirsch, B.. Universidad de Concepción; ChileFil: Bassino, Lilia Patricia. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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: Romanowsky, A. J.. Universidad de Concepción; ChileEDP Sciences2008-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/44106Richtler, T.; Schuberth, Y.; Hilker, M.; Dirsch, B.; Bassino, Lilia Patricia; et al.; The dark matter halo of NGC 1399: CDM or MOND?; EDP Sciences; Astronomy and Astrophysics; 478; 2; 2-2008; L23-L260004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20078539info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/05/aa8539-07/aa8539-07.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 Técnicas2025-09-29T10:36:27Zoai:ri.conicet.gov.ar:11336/44106instacron: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 10:36:27.545CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The dark matter halo of NGC 1399: CDM or MOND?
title The dark matter halo of NGC 1399: CDM or MOND?
spellingShingle The dark matter halo of NGC 1399: CDM or MOND?
Richtler, T.
Elliptical galaxies
Kinematics
KINEMATICS
NGC 1399 (galaxia)
title_short The dark matter halo of NGC 1399: CDM or MOND?
title_full The dark matter halo of NGC 1399: CDM or MOND?
title_fullStr The dark matter halo of NGC 1399: CDM or MOND?
title_full_unstemmed The dark matter halo of NGC 1399: CDM or MOND?
title_sort The dark matter halo of NGC 1399: CDM or MOND?
dc.creator.none.fl_str_mv Richtler, T.
Schuberth, Y.
Hilker, M.
Dirsch, B.
Bassino, Lilia Patricia
Romanowsky, A. J.
author Richtler, T.
author_facet Richtler, T.
Schuberth, Y.
Hilker, M.
Dirsch, B.
Bassino, Lilia Patricia
Romanowsky, A. J.
author_role author
author2 Schuberth, Y.
Hilker, M.
Dirsch, B.
Bassino, Lilia Patricia
Romanowsky, A. J.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Elliptical galaxies
Kinematics
KINEMATICS
NGC 1399 (galaxia)
topic Elliptical galaxies
Kinematics
KINEMATICS
NGC 1399 (galaxia)
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Central galaxies in galaxy clusters may be key discriminants in the competition between the cold dark matter (CDM) paradigm and modified Newtonian dynamics (MOND). Aims. We investigate the dark halo of NGC 1399, the central galaxy of the Fornax cluster, out to a galactocentric distance of 80 kpc. Methods. The data base consists of 656 radial velocities of globular clusters obtained with MXU/VLT and GMOS/Gemini, which is the largest sample so far for any galaxy. We performed a Jeans analysis for a non-rotating isotropic model. Results. An NFW halo with the parameters rs = 50 kpc and s = 0.0065 M/pc3 provides a good description of our data, fitting well to the X-ray mass. More massive halos are also permitted that agree with the mass of the Fornax cluster as derived from galaxy velocities. We compare this halo with the expected MOND models under isotropy and find that additional dark matter on the order of the stellar mass is needed to get agreement. A fully radial infinite globular cluster system would be needed to change this conclusion. Conclusions. Regarding CDM, we cannot draw firm conclusions. To really constrain a cluster wide halo, more data covering a larger radius are necessary. The MOND result appears as a small-scale variant of the finding that MOND in galaxy clusters still needs dark matter.
Fil: Richtler, T.. Universidad de Concepción; Chile
Fil: Schuberth, Y.. Universidad de Concepción; Chile
Fil: Hilker, M.. European Southern Observatory; Alemania
Fil: Dirsch, B.. Universidad de Concepción; Chile
Fil: Bassino, Lilia Patricia. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. 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: Romanowsky, A. J.. Universidad de Concepción; Chile
description Context. Central galaxies in galaxy clusters may be key discriminants in the competition between the cold dark matter (CDM) paradigm and modified Newtonian dynamics (MOND). Aims. We investigate the dark halo of NGC 1399, the central galaxy of the Fornax cluster, out to a galactocentric distance of 80 kpc. Methods. The data base consists of 656 radial velocities of globular clusters obtained with MXU/VLT and GMOS/Gemini, which is the largest sample so far for any galaxy. We performed a Jeans analysis for a non-rotating isotropic model. Results. An NFW halo with the parameters rs = 50 kpc and s = 0.0065 M/pc3 provides a good description of our data, fitting well to the X-ray mass. More massive halos are also permitted that agree with the mass of the Fornax cluster as derived from galaxy velocities. We compare this halo with the expected MOND models under isotropy and find that additional dark matter on the order of the stellar mass is needed to get agreement. A fully radial infinite globular cluster system would be needed to change this conclusion. Conclusions. Regarding CDM, we cannot draw firm conclusions. To really constrain a cluster wide halo, more data covering a larger radius are necessary. The MOND result appears as a small-scale variant of the finding that MOND in galaxy clusters still needs dark matter.
publishDate 2008
dc.date.none.fl_str_mv 2008-02
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/11336/44106
Richtler, T.; Schuberth, Y.; Hilker, M.; Dirsch, B.; Bassino, Lilia Patricia; et al.; The dark matter halo of NGC 1399: CDM or MOND?; EDP Sciences; Astronomy and Astrophysics; 478; 2; 2-2008; L23-L26
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/44106
identifier_str_mv Richtler, T.; Schuberth, Y.; Hilker, M.; Dirsch, B.; Bassino, Lilia Patricia; et al.; The dark matter halo of NGC 1399: CDM or MOND?; EDP Sciences; Astronomy and Astrophysics; 478; 2; 2-2008; L23-L26
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/10.1051/0004-6361:20078539
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/05/aa8539-07/aa8539-07.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
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 13.070432

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