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dc.contributor.author
Janz, Joachin
dc.contributor.author
Norris, Mark A.
dc.contributor.author
Forbes, Duncan A.
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Huxor, Avon
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Romanowsky, Aaron
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Frank, Matthias
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Escudero, Carlos Gabriel
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Faifer, Favio Raúl
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Forte, Juan Carlos
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Kannappan, Sheila J.
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Maraston, Claudia
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Brodie, Jean
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Strader, Jay
dc.contributor.author
Thompson, Bradley
dc.date.available
2018-02-07T15:10:12Z
dc.date.issued
2016-02
dc.identifier.citation
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
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/35941
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Galaxies
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Fundamental Parameters
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Stellar Content
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
The AIMSS Project, III : the stellar populations of compact stellar systems
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-12T19:26:27Z
dc.journal.volume
456
dc.journal.pagination
617-632
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Janz, Joachin. Swinburne University; Australia
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Fil: Norris, Mark A.. Gobierno de la Republica Federal de Alemania. Max Planck Institut Fur Astrophysik; Alemania
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Fil: Forbes, Duncan A.. Swinburne University; Australia
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Fil: Huxor, Avon. Universität Heidelberg; Alemania
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Fil: Romanowsky, Aaron. San José State University; Estados Unidos
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Fil: Frank, Matthias. Universität Heidelberg; Alemania
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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
dc.description.fil
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
dc.description.fil
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
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Fil: Kannappan, Sheila J.. University of North Carolina; Estados Unidos
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Fil: Maraston, Claudia. Institute of Cosmology snd Gravitation; Estados Unidos
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Fil: Brodie, Jean. University of California; Estados Unidos
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Fil: Strader, Jay. Michigan State University; Estados Unidos
dc.description.fil
Fil: Thompson, Bradley. San José State University; Estados Unidos
dc.journal.title
Monthly Notices of the Royal Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stv2636
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/456/1/617/1065825?redirectedFrom=fulltext


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