Investigation of the inner structures around HD 169142 with VLT/SPHERE
de Boer, J.
Quanz, S. P.
Cheetham, A. C.
AffiliationUniv Arizona, Dept Astron, Steward Observ
KeywordsStars: individual: HD169142
Planets and satellites: detection, formation
Techniques: high angular resolution
MetadataShow full item record
PublisherOXFORD UNIV PRESS
CitationInvestigation of the inner structures around HD 169142 with VLT/SPHERE 2018, 473 (2):1774 Monthly Notices of the Royal Astronomical Society
Rights© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
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AbstractWe present observations of the Herbig Ae star HD 169142 with the VLT/SPHERE instruments InfraRed Dual-band Imager and Spectrograph (IRDIS) (K1K2 and H2H3 bands) and the Integral Field Spectrograph (IFS) (Y, J and H bands). We detect several bright blobs at similar to 180 mas separation from the star, and a faint arc-like structure in the IFS data. Our reference differential imaging (RDI) data analysis also finds a bright ring at the same separation. We show, using a simulation based on polarized light data, that these blobs are actually part of the ring at 180 mas. These results demonstrate that the earlier detections of blobs in the H and K-S bands at these separations in Biller et al. as potential planet/substellar companions are actually tracing a bright ring with a Keplerian motion. Moreover, we detect in the images an additional bright structure at similar to 93 mas separation and position angle of 355 degrees, at a location very close to previous detections. It appears point-like in the YJ and K bands but is more extended in the H band. We also marginally detect an inner ring in the RDI data at similar to 100 mas. Follow-up observations are necessary to confirm the detection and the nature of this source and structure.
VersionFinal published version
SponsorsCentre National d'Etudes Spatiales (CNES); Swiss National Science Foundation; Programme National de Planetologie of Centre National de la Recherche Scientifique - Institut National des Sciences de l'Univers (CNRS-INSU); Programme National de Physique Stellaire of Centre National de la Recherche Scientifique - Institut National des Sciences de l'Univers (CNRS-INSU); French Labex OSUG (Investissements d'avenir) [ANR10 LABX56]; CNRS; Agence Nationale de la Recherche (ANR) [ANR-14-CE33-0018]; ANR of France [ANR-16-CE31-0013]; ESO; CNRS (France); MPIA (Germany); INAF (Italy); FINES (Switzerland); NOVA (Netherlands); European Commission Sixth Framework Programme as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) [RII3-Ct-2004-001566]; European Commission Seventh Framework Programme as part of the Optical Infrared Coordination Network for Astronomy (OPTICON) [226604, 312430]