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dc.contributor.authorRab, Ch
dc.contributor.authorKamp, I.
dc.contributor.authorGinski, C.
dc.contributor.authorOberg, N.
dc.contributor.authorMuro-Arena, G. A.
dc.contributor.authorDominik, C.
dc.contributor.authorWaters, L. B. F. M.
dc.contributor.authorThi, W. -F.
dc.contributor.authorWoitke, P.
dc.identifier.citationRab , C , Kamp , I , Ginski , C , Oberg , N , Muro-Arena , G A , Dominik , C , Waters , L B F M , Thi , W -F & Woitke , P 2019 , ' Observing the gas component of circumplanetary disks around wide-orbit planet-mass companions in the (sub)mm regime ' , Astronomy & Astrophysics , vol. 624 , A16 .
dc.identifier.otherPURE: 258237478
dc.identifier.otherPURE UUID: a2502f7e-8f43-4b45-b66f-7fef877839e7
dc.identifier.otherScopus: 85063867697
dc.identifier.otherWOS: 000462847600001
dc.descriptionC.R., G.M.-A., and C.G. acknowledge funding from the Netherlands Organisation for Scientific Research (NWO) TOP-1 grant as part of the research programme “Herbig Ae/Be stars, Rosetta stones for understanding the formation of planetary systems”, project number 614.001.552.en
dc.description.abstractContext. Several detections of wide-orbit planet-mass/sub-stellar companions around young solar-like stars were reported in the last decade. The origin of those possible planets is still unclear but accretion tracers and VLT/SPHERE observations indicate that they are surrounded by circumplanetary material or even a circumplanetary disk. Aims. We want to investigate if the gas component of disks around wide-orbit companions is detectable with current (ALMA) and future (ngVLA) (sub)mm telescopes and what constraints such gas observations can provide on the nature of the circumplanetary material and on the mass of the companion. Methods. We applied the radiation thermo-chemical disk code PRODIMOto model the dust and gas component of passive circum-planetary disks and produced realistic synthetic observables. We considered different companion properties (mass, luminosity), disk parameters (mass, size, dust properties) and radiative environments (background fields) and compared the resulting synthetic observables to telescope sensitivities and to existing dust observations. Results. The main criterion for a successful detection is the size of the circumplanetary disk. At a distance of about 150 pc, acircumplanetary disk with an outer radius of about 10 au is detectable with ALMA in about 6 hours in optically thick CO lines.Other aspects such as the companion’s luminosity, disk inclination and background radiation fields are also relevant, and should be considered to optimize the observing strategy for detection experiments. Conclusions. For most of the known wide-orbit planet-mass companions, their maximum theoretical disk size of one third of the Hill radius would be sufficient to allow detection of CO lines. It is therefore feasible to detect their gas disks and constrain the mass of the companion through the kinematic signature. Even in the case of non-detections such observations will provide stringent constraints on disk size and gas mass, information crucial for formation theories.
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rightsCopyright © 2019, ESO. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at
dc.subjectPlanets and satellites: formationen
dc.subjectSubmillimeter: planetary systemsen
dc.subjectStars: pre-main sequenceen
dc.subject(Stars:) planetary systemsen
dc.subjectAccretion, accretion disksen
dc.subjectMethods: numericalen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleObserving the gas component of circumplanetary disks around wide-orbit planet-mass companions in the (sub)mm regimeen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.St Andrews Centre for Exoplanet Scienceen
dc.description.statusPeer revieweden

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