High-contrast imaging of HD 163296 with the Keck/NIRC2 L′-band vortex coronograph

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dc.citation.firstpage1505en_US
dc.citation.issueNumber2en_US
dc.citation.journalTitleMonthly Notices of the Royal Astronomical Societyen_US
dc.citation.lastpage1513en_US
dc.citation.volumeNumber479en_US
dc.contributor.authorGuidi, G.en_US
dc.contributor.authorRuane, G.en_US
dc.contributor.authorWilliams, J.P.en_US
dc.contributor.authorMawet, D.en_US
dc.contributor.authorTesti, L.en_US
dc.contributor.authorZurlo, A.en_US
dc.contributor.authorAbsil, O.en_US
dc.contributor.authorBottom, M.en_US
dc.contributor.authorChoquet, E.en_US
dc.contributor.authorChristiaens, V.en_US
dc.contributor.authorCastellá, B. Femeníaen_US
dc.contributor.authorHuby, E.en_US
dc.contributor.authorIsella, A.en_US
dc.contributor.authorKastner, J.en_US
dc.contributor.authorMeshkat, T.en_US
dc.contributor.authorReggiani, M.en_US
dc.contributor.authorRiggs, A.en_US
dc.contributor.authorSerabyn, E.en_US
dc.contributor.authorWallack, N.en_US
dc.date.accessioned2018-11-01T14:28:12Zen_US
dc.date.available2018-11-01T14:28:12Zen_US
dc.date.issued2018en_US
dc.description.abstractWe present observations of the nearby (D∼100 pc) Herbig star HD 163296 taken with the vortex coronograph at Keck/NIRC2 in the L′ band (3.7 μμm) to search for planetary mass companions in the ringed disc surrounding this pre-main-sequence star. The images reveal an arc-like region of scattered light from the disc surface layers that is likely associated with the first bright ring detected with ALMA in the λ = 1.3 mm dust continuum at ∼65 au. We also detect a point-like source at ∼0.5 arcsec projected separation in the north-east direction, close to the inner edge of the second gap in the millimetre images. Comparing the point source photometry with the atmospheric emission models of non-accreting giant planets, we obtain a mass of 6–7 MJ for a putative protoplanet, assuming a system age of 5 Myr. Based on the contrast at a 95 per cent level of completeness calculated on the emission-free regions of our images, we set upper limits for the masses of giant planets of 8–15 MJ, 4.5–6.5 MJ, and 2.5–4.0 MJ at the locations of the first, second, and third gap in the millimetre dust continuum, respectively. Further deep, high-resolution thermal IR imaging of the HD 163296 system are warranted to confirm the presence and nature of the point source and to better understand the structure of the dust disc.en_US
dc.identifier.citationGuidi, G., Ruane, G., Williams, J.P., et al.. "High-contrast imaging of HD 163296 with the Keck/NIRC2 L′-band vortex coronograph." <i>Monthly Notices of the Royal Astronomical Society,</i> 479, no. 2 (2018) Oxford University Press: 1505-1513. https://doi.org/10.1093/mnras/sty1642.en_US
dc.identifier.digitalsty1642en_US
dc.identifier.doihttps://doi.org/10.1093/mnras/sty1642en_US
dc.identifier.urihttps://hdl.handle.net/1911/103273en_US
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.subject.keywordinstrumentation: adaptive opticsen_US
dc.subject.keywordprotoplanetary discsen_US
dc.subject.keywordstars: individual: HD 163296en_US
dc.subject.keywordstars: pre-main-sequenceen_US
dc.subject.keywordinfrared: planetary systemsen_US
dc.titleHigh-contrast imaging of HD 163296 with the Keck/NIRC2 L′-band vortex coronographen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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