VLT/SPHERE survey for exoplanets around young early-type stars, including systems with multi-belt architectures

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dc.contributor.authorLombart, M.
dc.contributor.authorChauvin, G.
dc.contributor.authorRojo, P.
dc.contributor.authorLagadec, E.
dc.contributor.authorDelorme, P.
dc.contributor.authorBeust, H.
dc.contributor.authorBonnefoy, M.
dc.contributor.authorGalicher, R.
dc.contributor.authorGratton, R.
dc.contributor.authorMesa, D.
dc.contributor.authorBonavita, M.
dc.contributor.authorAllard, F.
dc.contributor.authorBayo, A.
dc.contributor.authorBoccaletti, A.
dc.contributor.authorDesidera, S.
dc.contributor.authorGirard, J.
dc.contributor.authorJenkins, J.S.
dc.contributor.authorKlahr, H.
dc.contributor.authorLaibe, G.
dc.contributor.authorLagrange, A.-M.
dc.contributor.authorLazzoni, C.
dc.contributor.authorMarleau, G.-D.
dc.contributor.authorMinniti, D.
dc.contributor.authorMordasini, C.
dc.date.accessioned2021-11-25T20:20:27Z
dc.date.available2021-11-25T20:20:27Z
dc.date.issued2020-07
dc.descriptionIndexación: Scopuses
dc.description.abstractContext. Dusty debris disks around pre- and main-sequence stars are potential signposts for the existence of planetesimals and exoplanets. Giant planet formation is therefore expected to play a key role in the evolution of the disk. This is indirectly confirmed by extant submillimeter near-infrared images of young protoplanetary and cool dusty debris disks around main-sequence stars that usually show substantial spatial structures. With two decades of direct imaging of exoplanets already studied, it is striking to note that a majority of recent discoveries of imaged giant planets have been obtained around young early-type stars hosting a circumstellar disk. Aims. Our aim was to create a direct imaging program designed to maximize our chances of giant planet discovery and target 22 young early-type stars. About half of them show indications of multi-belt architectures. Methods. Using the IRDIS dual-band imager and the IFS integral field spectrograph of SPHERE to acquire high-constrast coronagraphic differential near-infrared images, we conducted a systematic search in the close environment of these young, dusty, and early-type stars. We used a combination of angular and spectral differential imaging to reach the best detection performances down to the planetary mass regime. Results. We confirm that companions detected around HIP 34276, HIP 101800, and HIP 117452 are stationary background sources and binary companions. The companion candidates around HIP 8832, HIP 16095, and HIP 95619 are determined as background contaminations. Regarding the stars for which we infer the presence of debris belts, a theoretical minimum mass for planets required to clear the debris gaps can be calculated. The dynamical mass limit is at least 0.1 MJ and can exceed 1 MJ. Direct imaging data is typically sensitive to planets down to ~3.6 MJ at 1′′, and 1.7 MJ in the best case. These two limits tightly constrain the possible planetary systems present around each target. These systems will be probably detectable with the next generation of planet imagers. © M. Lombart et al. 2020.es
dc.description.urihttps://www.aanda.org/10.1051/0004-6361/202037961
dc.identifier.citationAstronomy and Astrophysics Volume 6391 July 2020 Article number A54es
dc.identifier.doi10.1051/0004-6361/202037961
dc.identifier.issn0004-6361
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/21086
dc.language.isoenes
dc.publisherEDP Scienceses
dc.subjectPlanets and satellites: atmospheres.es
dc.subjectPlanets and satellites: detectiones
dc.subjectPlanets and satellites: fundamental parameters.es
dc.subjectTechniques: imaging spectroscopy.es
dc.titleVLT/SPHERE survey for exoplanets around young early-type stars, including systems with multi-belt architectureses
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