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PSYM-WIDE: A Survey for Large-separation Planetary-mass Companions to Late Spectral Type Members of Young Moving Groups

Naud, Marie-Eve; Artigau, Etienne; Doyon, R; Malo, Lison; Gagne, Jonathan; Lafreniere, David; Wolf, Christian; Magnier, Eugene A

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We present the results of a direct imaging survey for very large separation (>100 au), low-mass companions around 95 nearby young K5–L5 stars and brown dwarfs. They are high-likelihood candidates or confirmed members of the young (150 Myr) β Pictoris and AB Doradus moving groups (ABDMG) and the TW Hya, Tucana–Horologium, Columba, Carina, and Argus associations. Images in i¢ and z¢ filters were obtained with the Gemini Multi-Object Spectrograph (GMOS) on Gemini South to search for companions...[Show more]

dc.contributor.authorNaud, Marie-Eve
dc.contributor.authorArtigau, Etienne
dc.contributor.authorDoyon, R
dc.contributor.authorMalo, Lison
dc.contributor.authorGagne, Jonathan
dc.contributor.authorLafreniere, David
dc.contributor.authorWolf, Christian
dc.contributor.authorMagnier, Eugene A
dc.date.accessioned2021-09-07T23:49:15Z
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1885/247416
dc.description.abstractWe present the results of a direct imaging survey for very large separation (>100 au), low-mass companions around 95 nearby young K5–L5 stars and brown dwarfs. They are high-likelihood candidates or confirmed members of the young (150 Myr) β Pictoris and AB Doradus moving groups (ABDMG) and the TW Hya, Tucana–Horologium, Columba, Carina, and Argus associations. Images in i¢ and z¢ filters were obtained with the Gemini Multi-Object Spectrograph (GMOS) on Gemini South to search for companions down to an apparent magnitude of z¢ ∼ 22–24 at separations 20″ from the targets and in the remainder of the wide 5 5 × 5 5 GMOS field of view. This allowed us to probe the most distant region where planetary-mass companions could be gravitationally bound to the targets. This region was left largely unstudied by past high-contrast imaging surveys, which probed much closer-in separations. This survey led to the discovery of a planetary-mass (9–13 MJup) companion at 2000 au from the M3V star GU Psc, a highly probable member of ABDMG. No other substellar companions were identified. These results allowed us to constrain the frequency of distant planetary-mass companions (5–13 MJup) to 0.84 0.66 6.73-+% (95% confidence) at semimajor axes between 500 and 5000 au around young K5–L5 stars and brown dwarfs. This is consistent with other studies suggesting that gravitationally bound planetary-mass companions at wide separations from low-mass stars are relatively rare.
dc.description.sponsorshipSkyMapper data products were used. The national facility capability for SkyMapper has been funded through ARC LIEF grant LE130100104 from the Australian Research Council, awarded to the University of Sydney, the Australian National University, Swinburne University of Technology, the University of Queensland, the University of Western Australia, the University of Melbourne, Curtin University of Technology, Monash University, and the Australian Astronomical Observatory
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherUniversity of Chicago Press
dc.rights© 2017. The American Astronomical Society
dc.sourceAstronomical Journal
dc.subjectplanets and satellites: detection
dc.subjectplanets and satellites: gaseous planets
dc.subjectstars: individual (GU Psc)
dc.subjectstars: low-mass
dc.titlePSYM-WIDE: A Survey for Large-separation Planetary-mass Companions to Late Spectral Type Members of Young Moving Groups
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume154
dc.date.issued2017
local.identifier.absfor020199 - Astronomical and Space Sciences not elsewhere classified
local.identifier.ariespublicationu4351680xPUB83
local.publisher.urlhttp://iopscience.iop.org/1538-3881
local.type.statusPublished Version
local.contributor.affiliationNaud, Marie-Eve , Universite de Montreal
local.contributor.affiliationArtigau, Etienne, Universite de Montreal
local.contributor.affiliationDoyon, R, Université de Montréal
local.contributor.affiliationMalo, Lison, Canada-France-Hawaii Telescope Corporation
local.contributor.affiliationGagne, Jonathan, Carnegie Institution of Washington
local.contributor.affiliationLafreniere, David, Universite de Montreal
local.contributor.affiliationWolf, Christian, College of Science, ANU
local.contributor.affiliationMagnier, Eugene A, University of Hawaii
local.description.embargo2099-12-31
dc.relationhttp://purl.org/au-research/grants/arc/LE130100104
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage20
local.identifier.doi10.3847/1538-3881/aa826b
dc.date.updated2020-11-23T10:59:40Z
local.identifier.scopusID2-s2.0-85029041151
local.identifier.thomsonID000409393700002
CollectionsANU Research Publications

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