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dc.contributor.author Janz, Joachin
dc.contributor.author Norris, Mark A.
dc.contributor.author Forbes, Duncan A.
dc.contributor.author Huxor, Avon
dc.contributor.author Romanowsky, Aaron
dc.contributor.author Frank, Matthias
dc.contributor.author Escudero, Carlos Gabriel
dc.contributor.author Faifer, Favio Raúl
dc.contributor.author Forte, Juan Carlos
dc.contributor.author Kannappan, Sheila J.
dc.contributor.author Maraston, Claudia
dc.contributor.author Brodie, Jean
dc.contributor.author 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
dc.subject Fundamental parameters
dc.subject Stellar content
dc.subject.classification Astronomía
dc.subject.classification Ciencias Físicas
dc.subject.classification 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
dc.description.fil Fil: Norris, Mark A.. Gobierno de la Republica Federal de Alemania. Max Planck Institut Fur Astrophysik; Alemania
dc.description.fil Fil: Forbes, Duncan A.. Swinburne University; Australia
dc.description.fil Fil: Huxor, Avon. Universität Heidelberg; Alemania
dc.description.fil Fil: Romanowsky, Aaron. San José State University; Estados Unidos
dc.description.fil Fil: Frank, Matthias. Universität Heidelberg; Alemania
dc.description.fil 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
dc.description.fil Fil: Kannappan, Sheila J.. University of North Carolina; Estados Unidos
dc.description.fil Fil: Maraston, Claudia. Institute of Cosmology snd Gravitation; Estados Unidos
dc.description.fil Fil: Brodie, Jean. University of California; Estados Unidos
dc.description.fil 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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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)