The AIMSS Project, III : the stellar populations of compact stellar systems

Autores
Janz, Joachin; Norris, Mark A.; Forbes, Duncan A.; Huxor, Avon; Romanowsky, Aaron; Frank, Matthias; Escudero, Carlos Gabriel; Faifer, Favio Raúl; Forte, Juan Carlos; Kannappan, Sheila J.; Maraston, Claudia; Brodie, Jean; Strader, Jay; Thompson, Bradley
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In recent years, a growing zoo of compact stellar systems (CSSs) have been found whose physical properties (mass, size, velocity dispersion) place them between classical globular clusters (GCs) and true galaxies, leading to debates about their nature. Here we present results using a so far underutilized discriminant, their stellar population properties. Based on new spectroscopy from 8-10m telescopes, we derive ages, metallicities, and [α/Fe] of 29 CSSs. These range from GCs with sizes of merely a few parsec to compact ellipticals (cEs) larger than M32. Together with a literature compilation, this provides a panoramic view of the stellar population characteristics of early-type systems. We find that the CSSs are predominantly more metal rich than typical galaxies at the same stellar mass. At high mass, the cEs depart from the mass-metallicity relation of massive early-type galaxies, which forms a continuous sequence with dwarf galaxies. At lower mass, the metallicity distribution of ultracompact dwarfs (UCDs) changes at a few times 10^7 M⊙, which roughly coincides with the mass where luminosity function arguments previously suggested the GC population ends. The highest metallicities in CSSs are paralleled only by those of dwarf galaxy nuclei and the central parts of massive early types. These findings can be interpreted as CSSs previously being more massive and undergoing tidal interactions to obtain their current mass and compact size. Such an interpretation is supported by CSSs with direct evidence for tidal stripping, and by an examination of the CSS internal escape velocities.
Fil: Janz, Joachin. Swinburne University; Australia
Fil: Norris, Mark A.. Gobierno de la Republica Federal de Alemania. Max Planck Institut Fur Astrophysik; Alemania
Fil: Forbes, Duncan A.. Swinburne University; Australia
Fil: Huxor, Avon. Universität Heidelberg; Alemania
Fil: Romanowsky, Aaron. San José State University; Estados Unidos
Fil: Frank, Matthias. Universität Heidelberg; Alemania
Fil: Escudero, Carlos Gabriel. 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: Faifer, Favio Raúl. 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: Forte, Juan Carlos. Gobierno de la Ciudad de Buenos Aires. Secretaria de Cultura. Subsecretaria de Patrimonio Cultural. Planetario ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Kannappan, Sheila J.. University of North Carolina; Estados Unidos
Fil: Maraston, Claudia. Institute of Cosmology snd Gravitation; Estados Unidos
Fil: Brodie, Jean. University of California; Estados Unidos
Fil: Strader, Jay. Michigan State University; Estados Unidos
Fil: Thompson, Bradley. San José State University; Estados Unidos
Materia
Galaxies
Fundamental parameters
Stellar content
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:11336/35941
Acceder
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network_name_str CONICET Digital (CONICET)
spelling The AIMSS Project, III : the stellar populations of compact stellar systemsJanz, JoachinNorris, Mark A.Forbes, Duncan A.Huxor, AvonRomanowsky, AaronFrank, MatthiasEscudero, Carlos GabrielFaifer, Favio RaúlForte, Juan CarlosKannappan, Sheila J.Maraston, ClaudiaBrodie, JeanStrader, JayThompson, BradleyGalaxiesFundamental parametersStellar contenthttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1In recent years, a growing zoo of compact stellar systems (CSSs) have been found whose physical properties (mass, size, velocity dispersion) place them between classical globular clusters (GCs) and true galaxies, leading to debates about their nature. Here we present results using a so far underutilized discriminant, their stellar population properties. Based on new spectroscopy from 8-10m telescopes, we derive ages, metallicities, and [α/Fe] of 29 CSSs. These range from GCs with sizes of merely a few parsec to compact ellipticals (cEs) larger than M32. Together with a literature compilation, this provides a panoramic view of the stellar population characteristics of early-type systems. We find that the CSSs are predominantly more metal rich than typical galaxies at the same stellar mass. At high mass, the cEs depart from the mass-metallicity relation of massive early-type galaxies, which forms a continuous sequence with dwarf galaxies. At lower mass, the metallicity distribution of ultracompact dwarfs (UCDs) changes at a few times 10^7 M⊙, which roughly coincides with the mass where luminosity function arguments previously suggested the GC population ends. The highest metallicities in CSSs are paralleled only by those of dwarf galaxy nuclei and the central parts of massive early types. These findings can be interpreted as CSSs previously being more massive and undergoing tidal interactions to obtain their current mass and compact size. Such an interpretation is supported by CSSs with direct evidence for tidal stripping, and by an examination of the CSS internal escape velocities.Fil: Janz, Joachin. Swinburne University; AustraliaFil: Norris, Mark A.. Gobierno de la Republica Federal de Alemania. Max Planck Institut Fur Astrophysik; AlemaniaFil: Forbes, Duncan A.. Swinburne University; AustraliaFil: Huxor, Avon. Universität Heidelberg; AlemaniaFil: Romanowsky, Aaron. San José State University; Estados UnidosFil: Frank, Matthias. Universität Heidelberg; AlemaniaFil: Escudero, Carlos Gabriel. 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: Faifer, Favio Raúl. 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: Forte, Juan Carlos. Gobierno de la Ciudad de Buenos Aires. Secretaria de Cultura. Subsecretaria de Patrimonio Cultural. Planetario ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Kannappan, Sheila J.. University of North Carolina; Estados UnidosFil: Maraston, Claudia. Institute of Cosmology snd Gravitation; Estados UnidosFil: Brodie, Jean. University of California; Estados UnidosFil: Strader, Jay. Michigan State University; Estados UnidosFil: Thompson, Bradley. San José State University; Estados UnidosWiley Blackwell Publishing, Inc2016-02info: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/11336/35941Janz, Joachin; Norris, Mark A.; Forbes, Duncan A.; Huxor, Avon; Romanowsky, Aaron; et al.; The AIMSS Project, III : the stellar populations of compact stellar systems; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 456; 2-2016; 617-6320035-8711CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stv2636info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/456/1/617/1065825?redirectedFrom=fulltextinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:16:26Zoai:ri.conicet.gov.ar:11336/35941instacron: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:34982025-10-15 15:16:26.39CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The AIMSS Project, III : the stellar populations of compact stellar systems
title The AIMSS Project, III : the stellar populations of compact stellar systems
spellingShingle The AIMSS Project, III : the stellar populations of compact stellar systems
Janz, Joachin
Galaxies
Fundamental parameters
Stellar content
title_short The AIMSS Project, III : the stellar populations of compact stellar systems
title_full The AIMSS Project, III : the stellar populations of compact stellar systems
title_fullStr The AIMSS Project, III : the stellar populations of compact stellar systems
title_full_unstemmed The AIMSS Project, III : the stellar populations of compact stellar systems
title_sort The AIMSS Project, III : the stellar populations of compact stellar systems
dc.creator.none.fl_str_mv Janz, Joachin
Norris, Mark A.
Forbes, Duncan A.
Huxor, Avon
Romanowsky, Aaron
Frank, Matthias
Escudero, Carlos Gabriel
Faifer, Favio Raúl
Forte, Juan Carlos
Kannappan, Sheila J.
Maraston, Claudia
Brodie, Jean
Strader, Jay
Thompson, Bradley
author Janz, Joachin
author_facet Janz, Joachin
Norris, Mark A.
Forbes, Duncan A.
Huxor, Avon
Romanowsky, Aaron
Frank, Matthias
Escudero, Carlos Gabriel
Faifer, Favio Raúl
Forte, Juan Carlos
Kannappan, Sheila J.
Maraston, Claudia
Brodie, Jean
Strader, Jay
Thompson, Bradley
author_role author
author2 Norris, Mark A.
Forbes, Duncan A.
Huxor, Avon
Romanowsky, Aaron
Frank, Matthias
Escudero, Carlos Gabriel
Faifer, Favio Raúl
Forte, Juan Carlos
Kannappan, Sheila J.
Maraston, Claudia
Brodie, Jean
Strader, Jay
Thompson, Bradley
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Galaxies
Fundamental parameters
Stellar content
topic Galaxies
Fundamental parameters
Stellar content
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In recent years, a growing zoo of compact stellar systems (CSSs) have been found whose physical properties (mass, size, velocity dispersion) place them between classical globular clusters (GCs) and true galaxies, leading to debates about their nature. Here we present results using a so far underutilized discriminant, their stellar population properties. Based on new spectroscopy from 8-10m telescopes, we derive ages, metallicities, and [α/Fe] of 29 CSSs. These range from GCs with sizes of merely a few parsec to compact ellipticals (cEs) larger than M32. Together with a literature compilation, this provides a panoramic view of the stellar population characteristics of early-type systems. We find that the CSSs are predominantly more metal rich than typical galaxies at the same stellar mass. At high mass, the cEs depart from the mass-metallicity relation of massive early-type galaxies, which forms a continuous sequence with dwarf galaxies. At lower mass, the metallicity distribution of ultracompact dwarfs (UCDs) changes at a few times 10^7 M⊙, which roughly coincides with the mass where luminosity function arguments previously suggested the GC population ends. The highest metallicities in CSSs are paralleled only by those of dwarf galaxy nuclei and the central parts of massive early types. These findings can be interpreted as CSSs previously being more massive and undergoing tidal interactions to obtain their current mass and compact size. Such an interpretation is supported by CSSs with direct evidence for tidal stripping, and by an examination of the CSS internal escape velocities.
Fil: Janz, Joachin. Swinburne University; Australia
Fil: Norris, Mark A.. Gobierno de la Republica Federal de Alemania. Max Planck Institut Fur Astrophysik; Alemania
Fil: Forbes, Duncan A.. Swinburne University; Australia
Fil: Huxor, Avon. Universität Heidelberg; Alemania
Fil: Romanowsky, Aaron. San José State University; Estados Unidos
Fil: Frank, Matthias. Universität Heidelberg; Alemania
Fil: Escudero, Carlos Gabriel. 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: Faifer, Favio Raúl. 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: Forte, Juan Carlos. Gobierno de la Ciudad de Buenos Aires. Secretaria de Cultura. Subsecretaria de Patrimonio Cultural. Planetario ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Kannappan, Sheila J.. University of North Carolina; Estados Unidos
Fil: Maraston, Claudia. Institute of Cosmology snd Gravitation; Estados Unidos
Fil: Brodie, Jean. University of California; Estados Unidos
Fil: Strader, Jay. Michigan State University; Estados Unidos
Fil: Thompson, Bradley. San José State University; Estados Unidos
description In recent years, a growing zoo of compact stellar systems (CSSs) have been found whose physical properties (mass, size, velocity dispersion) place them between classical globular clusters (GCs) and true galaxies, leading to debates about their nature. Here we present results using a so far underutilized discriminant, their stellar population properties. Based on new spectroscopy from 8-10m telescopes, we derive ages, metallicities, and [α/Fe] of 29 CSSs. These range from GCs with sizes of merely a few parsec to compact ellipticals (cEs) larger than M32. Together with a literature compilation, this provides a panoramic view of the stellar population characteristics of early-type systems. We find that the CSSs are predominantly more metal rich than typical galaxies at the same stellar mass. At high mass, the cEs depart from the mass-metallicity relation of massive early-type galaxies, which forms a continuous sequence with dwarf galaxies. At lower mass, the metallicity distribution of ultracompact dwarfs (UCDs) changes at a few times 10^7 M⊙, which roughly coincides with the mass where luminosity function arguments previously suggested the GC population ends. The highest metallicities in CSSs are paralleled only by those of dwarf galaxy nuclei and the central parts of massive early types. These findings can be interpreted as CSSs previously being more massive and undergoing tidal interactions to obtain their current mass and compact size. Such an interpretation is supported by CSSs with direct evidence for tidal stripping, and by an examination of the CSS internal escape velocities.
publishDate 2016
dc.date.none.fl_str_mv 2016-02
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/11336/35941
Janz, Joachin; Norris, Mark A.; Forbes, Duncan A.; Huxor, Avon; Romanowsky, Aaron; et al.; The AIMSS Project, III : the stellar populations of compact stellar systems; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 456; 2-2016; 617-632
0035-8711
CONICET Digital
CONICET
url http://hdl.handle.net/11336/35941
identifier_str_mv Janz, Joachin; Norris, Mark A.; Forbes, Duncan A.; Huxor, Avon; Romanowsky, Aaron; et al.; The AIMSS Project, III : the stellar populations of compact stellar systems; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 456; 2-2016; 617-632
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/doi/10.1093/mnras/stv2636
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/456/1/617/1065825?redirectedFrom=fulltext
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 13.22299

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