High Contrast Imaging of the Close Environment of HD 142527 -

Abstract

Context. It has long been suggested that circumstellar disks surrounding young stars may be the signposts of planets, and still more since the recent discoveries of embedded substellar companions. The planet-disk interaction may create, according to models, large structures, gaps, rings or spirals, in the disk. In that sense, the Herbig star HD 142527 is particularly compelling as, its massive disk displays intriguing asymmetries that suggest the existence of a dynamical peturber of unknown nature. Aims. Our goal was to obtain deep thermal images of the close circumstellar environment of HD 142527 to re-image the reported close-in structures (cavity, spiral arms) of the disk and to search for stellar and substellar companions that could be connected to their presence. Results. The circumstellar environment of HD 142527 is revealed at an unprecedented spatial resolution down to the sub arcsecond level for the first time at 3.8 microns. Our images reveal important radial and azimuthal asymmetries which invalidate an elliptical shape for the disk as previously proposed. It rather suggests a bright inhomogeneous spiral arm plus various fainter spiral arms. We also confirm an inner cavity down to 30 AU and two important dips at position angles of 0 and 135 deg. The detection performance in angular differential imaging enables the exploration of the planetary mass regime for projected physical separations as close as 40 AU. The use of our detection map together with Monte Carlo simulations sets stringent constraints on the presence of planetary mass, brown dwarf or stellar companions as a function of the semi-major axis. They severely constrain the presence of massive giant planets with semi-major axis beyond 50AU, i.e. probably within the large disk's cavity that radially extends up to 145 AU or even further outside.

arXiv comment8 pages, 7 figures, accepted in A&A

References in corpus (35)

• Validation of the new Hipparcos reduction
• Direct Imaging of Multiple Planets Orbiting the Star HR 8799
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• A Hipparcos census of the nearby OB associations
• Angular Differential Imaging: a Powerful High-Contrast Imaging Technique
• Images of a fourth planet orbiting HR 8799
• A giant planet imaged in the disk of the young star Beta Pictoris
• Optical Images of an Exosolar Planet 25 Light Years from Earth
• Resolved Images of Large Cavities in Protoplanetary Transition Disks
• A new algorithm for point spread function subtraction in high-contrast imaging: a demonstration with angular differential imaging
• Discovery of Small-Scale Spiral Structures in the Disk of SAO 206462 (HD 135344B): Implications for the Physical State of the Disk from Spiral Density Wave Theory
• Extrasolar planet population synthesis IV. Correlations with disk metallicity, mass and lifetime
• The Two Modes of Gas Giant Planet Formation
• Predicting the Properties of Binary Stellar Systems: The Evolution of Accreting Protobinary Systems
• ISO spectroscopy of disks around Herbig Ae/Be stars
• A companion to AB Pic at the planet/brown dwarf boundary
• Direct Imaging and Spectroscopy of a Planetary Mass Candidate Companion to a Young Solar Analog
• Fomalhaut's Debris Disk and Planet: Constraining the Mass of Fomalhaut b From Disk Morphology
• The Formation Mechanism of Gas Giants on Wide Orbits
• Impact of angular differential imaging on circumstellar disk images
• A Likely Close-In Low-Mass Stellar Companion to the Transitional Disk Star HD 142527
• Orbital characterization of the βPictoris b giant planet
• Understanding the spectra of isolated Herbig stars in the frame of a passive disk model
• A novel L-band imaging search for giant planets in the Tucana and Beta Pictoris moving groups
• A companion candidate in the gap of the T Cha transitional disk
• Long range outward migration of giant planets, with application to Fomalhaut b
• Outer edges of debris discs: how sharp is sharp?
• The complex circumstellar environment of HD142527
• High resolution imaging of young M-type stars of the solar neighborhood: Probing the existence of companions down to the mass of Jupiter
• The dynamically disrupted gap in HD 142527
• Constrains on planets around beta Pic with Harps radial velocity data
• Modelling Circumbinary Gas Flows in Close T Tauri Binaries
• The Asymmetric Thermal Emission of Protoplanetary Disk Surrounding HD 142527 Seen by Subaru/COMICS
• MESS (Multi-purpose Exoplanet Simulation System): A Monte Carlo tool for the statistical analysis and prediction of exoplanets search results
• An insight in the surroundings of HR4796

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• ISPY-NACO Imaging Survey for Planets around Young stars. The demographics of forming planets embedded in protoplanetary disks
• Low Level Carbon Monoxide Line Polarization in two Protoplanetary Disks: HD 142527 and IM Lup
• The water-ice feature in near-infrared disk-scattered light around HD 142527: Micron-sized icy grains lifted up to the disk surface?
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• Very Large Telescope observations of Gomez's Hamburger: Insights into a young protoplanet candidate
• Early High-contrast Imaging Results with Keck/NIRC2-PWFS: The SR 21 Disk