94 Ceti: a triple star with a planet and dust disc

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dc.contributor.authorWiegert, J.
dc.contributor.authorFaramaz, V.
dc.contributor.authorCruz Saenz de Miera, F.
dc.date.accessioned2024-01-10T12:37:21Z
dc.date.available2024-01-10T12:37:21Z
dc.date.issued2016
dc.description.abstract94 Ceti is a triple star system with a circumprimary gas giant planet and far-infrared excess. Such excesses around main sequence stars are likely due to debris discs, and are considered as signposts of planetary systems and, therefore, provide important insights into the configuration and evolution of the planetary system. Consequently, to learn more about the 94 Ceti system, we aim to model the dust emission precisely to fit its observed spectral energy distribution and to simulate its orbital dynamics. We interpret our APEX bolometric observations and complement them with archived Spitzer and Herschel bolometric data to explore the stellar excess and to map out background sources in the fields. Dynamical simulations and 3D radiative transfer calculations were used to constrain the debris disc configurations and model the dust emission. The best-fitting dust disc model for 94 Ceti implies a circumbinary disc around the secondary pair, limited by dynamics to radii smaller than 40 au and with a grain-size power-law distribution of similar to a(-3.5). This model exhibits a dust-to-star luminosity ratio of 4.6 +/- 0.4 x 10(-6). The system is dynamically stable and N-body symplectic simulation results are consistent with semi-analytical equations that describe orbits in binary systems. In the observations, we also find tentative evidence of a circumtertiary ring that could be edge-on.
dc.description.funderFONDECYT
dc.description.funderMillenium Nucleus (Chilean Ministry of Economy)
dc.description.funderMillennium Nucleus 'Protoplanetary Disks'
dc.description.funderCONACyT
dc.description.funderNational Aeronautics and Space Administration (NASA)
dc.description.funderNational Science Foundation
dc.description.funderNational Aeronautics and Space Administration
dc.fechaingreso.objetodigital2024-04-30
dc.format.extent14 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stw1682
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stw1682
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76825
dc.identifier.wosidWOS:000384674100040
dc.information.autorucFísica;Faramaz V;S/I;250653
dc.issue.numero2
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final1748
dc.pagina.inicio1735
dc.publisherOXFORD UNIV PRESS
dc.revistaMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
dc.rightsregistro bibliográfico
dc.subjectbinaries: general
dc.subjectstars: individual: 94 Ceti (HD 19994, HIP 14954)
dc.subjectplanetary systems
dc.subjectinfrared: stars
dc.subjectsubmillimetre: stars
dc.subjectBETA-PICTORIS
dc.subjectDEBRIS DISKS
dc.subjectBINARY-SYSTEMS
dc.subjectSTELLAR MULTIPLICITY
dc.subjectINFRARED SPECTROGRAPH
dc.subjectDYNAMICAL SIMULATIONS
dc.subjectCIRCUMSTELLAR DISKS
dc.subjectSIZE DISTRIBUTIONS
dc.subjectNEARBY STARS
dc.subjectINNER DISK
dc.title94 Ceti: a triple star with a planet and dust disc
dc.typeartículo
dc.volumen462
sipa.codpersvinculados250653
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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