Статья

Exploring Dust around HD 142527 down to 0.″025 (4 au) Using SPHERE/ZIMPOL

H. AvenhausDepartamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, ChileSascha P. QuanzETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Str. 27, CH-8093, Zurich, Switzerland; [email protected]H. M. SchmidETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Str. 27, CH-8093, Zurich, Switzerland; [email protected]C. DominikAnton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The NetherlandsT. StolkerAnton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The NetherlandsC. GinskiLeiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The NetherlandsJ. de BoerLeiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The NetherlandsJ. SzulágyiETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Str. 27, CH-8093, Zurich, Switzerland; [email protected]A. GarufiUniversidad Autonónoma de Madrid, Dpto. Física Teórica, Módulo 15, Facultad de Ciencias, Campus de Cantoblanco, E-28049 Madrid, SpainA. ZurloMillennium Nucleus “Protoplanetary Disk”, Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, ChileJ. HagelbergUniv. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, FranceM. BenistyUniv. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, FranceT. HenningMax-Planck-Institut fur Astronomie, Königstuhl 17, D-69117 Heidelberg, GermanyF. MénardUniv. Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, FranceMichael R. MeyerDepartment of Astronomy, University of Michigan, 1085 S. University, Ann Arbor, MI 48109, USAAndrea BaruffoloINAF Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, ItalyA. BazzonETH Zurich, Institute for Astronomy, Wolfgang-Pauli-Str. 27, CH-8093, Zurich, Switzerland; [email protected]Jean-Luc BeuzitCNRS, IPAG, F-38000 Grenoble, FranceA. CostilleAix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, F-13388, Marseille, FranceK. DohlenAix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, F-13388, Marseille, FranceJ. H. GirardEuropean Southern Observatory, Alonso de Cordova 3107, Casilla 19001 Vitacura, Santiago 19, ChileD. GislerKiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, D-79104 Freiburg, GermanyM. KasperEuropean Southern Observatory, Karl-Schwarzschild-Str., 2, D-85748 Garching, GermanyD. MouilletCNRS, IPAG, F-38000 Grenoble, FranceJ. PragtR. RoelfsemaBernardo SalasnichINAF Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, I-35122 Padova, ItalyJean-François SauvageAix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, F-13388, Marseille, France

2017en

ABI

Аннотация

Abstract We have observed the protoplanetary disk of the well-known young Herbig star HD 142527 using ZIMPOL polarimetric differential imaging with the very broad band (∼600–900 nm) filter. We obtained two data sets in 2015 May and 2016 March. Our data allow us to explore dust scattering around the star down to a radius of ∼0.″025 (∼4 au). The well-known outer disk is clearly detected at higher resolution than before and shows previously unknown substructures, including spirals going inward into the cavity. Close to the star, dust scattering is detected at high signal-to-noise ratio, but it is unclear whether the signal represents the inner disk, which has been linked to the two prominent local minima in the scattering of the outer disk that are interpreted as shadows. An interpretation of an inclined inner disk combined with a dust halo is compatible with both our and previous observations, but other arrangements of the dust cannot be ruled out. Dust scattering is also present within the large gap between ∼30 and ∼140 au. The comparison of the two data sets suggests rapid evolution of the inner regions of the disk, potentially driven by the interaction with the close-in M-dwarf companion, around which no polarimetric signal is detected.

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Идентификаторы

DOI: 10.3847/1538-3881/aa7560

Цитирования и источники

Цитирований: 2Использованных источников: 0

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