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dc.contributor.authorBenisty, Myriam
dc.contributor.authorBae, Jaehan
dc.contributor.authorFacchini, Stefano
dc.contributor.authorKeppler, Miriam
dc.contributor.authorTeague, Richard
dc.contributor.authorIsella, Andrea
dc.contributor.authorKurtovic, Nicolas T.
dc.contributor.authorPérez, Laura M.
dc.contributor.authorSierra, Anibal
dc.contributor.authorAndrews, Sean M.
dc.contributor.authorCarpenter, John
dc.contributor.authorCzekala, Ian
dc.contributor.authorDominik, Carsten
dc.contributor.authorHenning, Thomas
dc.contributor.authorMenard, Francois
dc.contributor.authorPinilla, Paola
dc.contributor.authorZurlo, Alice
dc.identifier.citationBenisty , M , Bae , J , Facchini , S , Keppler , M , Teague , R , Isella , A , Kurtovic , N T , Pérez , L M , Sierra , A , Andrews , S M , Carpenter , J , Czekala , I , Dominik , C , Henning , T , Menard , F , Pinilla , P & Zurlo , A 2021 , ' A circumplanetary disk around PDS70c ' , Astrophysical Journal Letters , vol. 916 , no. 1 , L2 .
dc.identifier.otherBibCode: 2021ApJ...916L...2B
dc.identifier.otherORCID: /0000-0002-1483-8811/work/141643337
dc.descriptionFunding: This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 101002188 and No. 832428). J.B. acknowledges support by NASA through the NASA Hubble Fellowship grant #HST-HF2-51427.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5-26555. S.F. acknowledges an ESO Fellowship. S.A. acknowledges support from the National Aeronautics and Space Administration under grant No. 17-XRP17 2-0012 issued through the Exoplanets Research Program. A.I. acknowledges support from the National Science Foundation under grant No. AST1715719 and from NASA under grant No. 80NSSC18K0828. J.M.C. acknowledges support from the National Aeronautics and Space Administration under grant No. 15XRP15_20140 issued through the Exoplanets Research Program. N.T.K. and P.P. acknowledge support provided by the Alexander von Humboldt Foundation in the framework of the Sofja Kovalevskaja Award endowed by the Federal Ministry of Education and Research.en
dc.description.abstractPDS 70 is a unique system in which two protoplanets, PDS 70 b and c, have been discovered within the dust-depleted cavity of their disk, at ~22 and 34 au, respectively, by direct imaging at infrared wavelengths. Subsequent detection of the planets in the Hα line indicates that they are still accreting material through circumplanetary disks. In this Letter, we present new Atacama Large Millimeter/submillimeter Array (ALMA) observations of the dust continuum emission at 855 μm at high angular resolution (~20 mas, 2.3 au) that aim to resolve the circumplanetary disks and constrain their dust masses. Our observations confirm the presence of a compact source of emission co-located with PDS 70 c, spatially separated from the circumstellar disk and less extended than ~1.2 au in radius, a value close to the expected truncation radius of the circumplanetary disk at a third of the Hill radius. The emission around PDS 70 c has a peak intensity of ~86 ± 16 μJy beam-1, which corresponds to a dust mass of ~0.031 M⊕ or ~0.007 M⊕, assuming that it is only constituted of 1 μm or 1 mm sized grains, respectively. We also detect extended, low surface brightness continuum emission within the cavity near PDS 70 b. We observe an optically thin inner disk within 18 au of the star with an emission that could result from small micron-sized grains transported from the outer disk through the orbits of b and c. In addition, we find that the outer disk resolves into a narrow and bright ring with a faint inner shoulder.
dc.relation.ispartofAstrophysical Journal Lettersen
dc.subjectProtoplanetary disksen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleA circumplanetary disk around PDS70cen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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