학술논문
Investigation of the inner structures around HD169142 with VLT/SPHERE
Document Type
Working Paper
Author
Ligi, R.; Vigan, A.; Gratton, R.; de Boer, J.; Benisty, M.; Boccaletti, A.; Quanz, S. P.; Meyer, M.; Ginski, C.; Sissa, E.; Gry, C.; Henning, T.; Beuzit, J. -L.; Biller, B.; Bonnefoy, M.; Chauvin, G.; Cheetham, A. C.; Cudel, M.; Delorme, P.; Desidera, S.; Feldt, M.; Galicher, R.; Girard, J.; Janson, M.; Kasper, M.; Kopytova, T.; Lagrange, A. -M.; Langlois, M.; Lecoroller, H.; Maire, A. -L.; Ménard, F.; Mesa, D.; Peretti, S.; Perrot, C.; Pinilla, P.; Pohl, A.; Rouan, D.; Stolker, T.; Samland, M.; Wahhaj, Z.; Wildi, F.; Zurlo, A.; Buey, T.; Fantinel, D.; Fusco, T.; Jaquet, M.; Moulin, T.; Ramos, J.; Suarez, M.; Weber, L.
Source
MNRAS, Volume 473, Issue 2, January 2018
Subject
Language
Abstract
We present observations of the Herbig Ae star HD169142 with 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 $\sim$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 $\sim$93 mas separation and position angle of 355$^{\circ}$, 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 $\sim$100 mas. Follow-up observations are necessary to confirm the detection and the nature of this source and structure.
Comment: 11 pages, 7 figures, 2 tables; published in MNRAS (this version includes proofs corrections)
Comment: 11 pages, 7 figures, 2 tables; published in MNRAS (this version includes proofs corrections)