Investigation of the inner structures around HD 169142 with VLT/SPHERE
Date Issued
2018
Author(s)
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Vigan, A.
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•
de Boer, J.
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Benisty, M.
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Boccaletti, A.
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Quanz, S. P.
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Meyer, M.
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Ginski, C.
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Sissa, E.
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Gry, C.
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Henning, T.
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Beuzit, J. -L.
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Biller, B.
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Bonnefoy, M.
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Chauvin, G.
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Cheetham, A. C.
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Cudel, M.
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Delorme, P.
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•
Feldt, M.
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Galicher, R.
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Girard, J.
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Janson, M.
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Kasper, M.
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Kopytova, T.
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Lagrange, A. -M.
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Langlois, M.
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Lecoroller, H.
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Maire, A. -L.
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Ménard, F.
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•
Peretti, S.
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Perrot, C.
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Pinilla, P.
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Pohl, A.
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Rouan, D.
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Stolker, T.
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Samland, M.
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Wahhaj, Z.
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Wildi, F.
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Zurlo, A.
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Buey, T.
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Fusco, T.
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Jaquet, M.
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Moulin, T.
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Ramos, J.
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Suarez, M.
•
Weber, L.
Abstract
We 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 ˜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 KS 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 ˜93 mas separation and position angle of 355°, 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 ˜100 mas. Follow-up observations are necessary to confirm the detection and the nature of this source and structure.
Volume
473
Issue
2
Start page
1774
Issn Identifier
0035-8711
Ads BibCode
2018MNRAS.473.1774L
Rights
open.access
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