Building the Largest Spectroscopic Sample of Ultracompact Massive Galaxies with the Kilo Degree Survey

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dc.contributor.authorScognamiglio, Diana
dc.contributor.authorTortora, Crescenzo
dc.contributor.authorSpavone, Marilena
dc.contributor.authorSpiniello, Chiara
dc.contributor.authorNapolitano, Nicola R.
dc.contributor.authorD'Ago, Giuseppe
dc.contributor.authorLa Barbera, Francesco
dc.contributor.authorGetman, Fedor
dc.contributor.authorRoy, Nivya
dc.contributor.authorRaj, Maria Angela
dc.contributor.authorRadovich, Mario
dc.contributor.authorBrescia, Massimo
dc.contributor.authorCavuoti, Stefano
dc.contributor.authorKoopmans, Leon V. E.
dc.contributor.authorKuijken, Koen H.
dc.contributor.authorLongo, Giuseppe
dc.contributor.authorPetrillo, Carlo Enrico
dc.date.accessioned2024-01-10T12:37:52Z
dc.date.available2024-01-10T12:37:52Z
dc.date.issued2020
dc.description.abstractUltracompact massive galaxies (UCMGs), i.e., galaxies with stellar masses M. > 8 ' 1010M. and effective radii Re < 1.5 kpc, are very rare systems, in particular at low and intermediate redshifts. Their origin as well as their number density across cosmic time are still under scrutiny, especially because of the paucity of spectroscopically confirmed samples. We have started a systematic census of UCMG candidates within the ESO Kilo Degree Survey, together with a large spectroscopic follow-up campaign to build the largest possible sample of confirmed UCMGs. This is the third paper of the series and the second based on the spectroscopic follow-up program. Here, we present photometrical and structural parameters of 33 new candidates at redshifts 0.15. z. 0.5 and confirm 19 of them as UCMGs, based on their nominal spectroscopically inferred M. and Re. This corresponds to a success rate of 58%, nicely consistent with our previous findings. The addition of these 19 newly confirmed objects allows us to fully assess the systematics on the system selection-and to finally reduce the number density uncertainties. Moreover, putting together the results from our current and past observational campaigns and some literature data, we build the largest sample of UCMGs ever collected, comprising 92 spectroscopically confirmed objects at 0.1. z. 0.5. This number raises to 116, allowing for a 3s tolerance on the M. and Re thresholds for the UCMG definition. For all these galaxies, we have estimated the velocity dispersion values at the effective radii, which have been used to derive a preliminary mass-velocity dispersion correlation.
dc.description.funderINAF PRIN-SKA 2017 program
dc.description.funderVST project
dc.description.funderEuropean Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie actions
dc.description.funderCONICYT project Basal
dc.description.funderMIUR Premiale 2016: MITIC
dc.description.funderASI/INAF
dc.description.funderESO Telescopes at the La Silla Paranal Observatory
dc.description.funderNOVA grant
dc.description.funderNWO-M grant
dc.description.funderDepartment of Physics & Astronomy of the University of Padova
dc.description.funderDepartment of Physics of the Univ. Federico II (Naples)
dc.fechaingreso.objetodigital2024-05-28
dc.format.extent22 páginas
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/ab7db3
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/ab7db3
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76939
dc.identifier.wosidWOS:000525505100001
dc.information.autorucAstrofísica;D’Ago Giuseppe;S/I;1084864
dc.issue.numero1
dc.language.isoen
dc.nota.accesoContenido completo
dc.publisherIOP PUBLISHING LTD
dc.revistaASTROPHYSICAL JOURNAL
dc.rightsacceso abierto
dc.subjectSTELLAR POPULATION SYNTHESIS
dc.subjectPHOTOMETRIC REDSHIFTS
dc.subjectVELOCITY DISPERSION
dc.subjectCOMPACT GALAXIES
dc.subjectRED NUGGETS
dc.subjectEVOLUTION
dc.subjectLIGHT
dc.subjectWINGS
dc.subjectSDSS
dc.subjectIMF
dc.titleBuilding the Largest Spectroscopic Sample of Ultracompact Massive Galaxies with the Kilo Degree Survey
dc.typeartículo
dc.volumen893
sipa.codpersvinculados1084864
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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