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

Simple item page
dc.citation.firstpage1505
dc.citation.issueNumber2
dc.citation.journalTitleMonthly Notices of the Royal Astronomical Society
dc.citation.lastpage1513
dc.citation.volumeNumber479
dc.contributor.authorGuidi, G.
dc.contributor.authorRuane, G.
dc.contributor.authorWilliams, J.P.
dc.contributor.authorMawet, D.
dc.contributor.authorTesti, L.
dc.contributor.authorZurlo, A.
dc.contributor.authorAbsil, O.
dc.contributor.authorBottom, M.
dc.contributor.authorChoquet, E.
dc.contributor.authorChristiaens, V.
dc.contributor.authorCastellá, B. Femenía
dc.contributor.authorHuby, E.
dc.contributor.authorIsella, A.
dc.contributor.authorKastner, J.
dc.contributor.authorMeshkat, T.
dc.contributor.authorReggiani, M.
dc.contributor.authorRiggs, A.
dc.contributor.authorSerabyn, E.
dc.contributor.authorWallack, N.
dc.date.accessioned2018-11-01T14:28:12Z
dc.date.available2018-11-01T14:28:12Z
dc.date.issued2018
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.
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.
dc.identifier.digitalsty1642
dc.identifier.doihttps://doi.org/10.1093/mnras/sty1642
dc.identifier.urihttps://hdl.handle.net/1911/103273
dc.language.isoeng
dc.publisherOxford University Press
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.
dc.subject.keywordinstrumentation: adaptive optics
dc.subject.keywordprotoplanetary discs
dc.subject.keywordstars: individual: HD 163296
dc.subject.keywordstars: pre-main-sequence
dc.subject.keywordinfrared: planetary systems
dc.titleHigh-contrast imaging of HD 163296 with the Keck/NIRC2 L′-band vortex coronograph
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
sty1642.pdf
Size:
3.43 MB
Format:
Adobe Portable Document Format
Download
Collections
Faculty Publications
Physics and Astronomy Publications