The Peculiar Debris Disk of HD 111520 as Resolved by the Gemini Planet Imager

Abstract

Using the Gemini Planet Imager (GPI), we have resolved the circumstellar debris disk around HD 111520 at a projected range of ~30-100 AU in both total and polarized $H$-band intensity. The disk is seen edge-on at a position angle of ~165${}^{\circ }$ along the spine of emission. A slight inclination or asymmetric warping are covariant and alters the interpretation of the observed disk emission. We employ 3 point spread function (PSF) subtraction methods to reduce the stellar glare and instrumental artifacts to confirm that there is a roughly 2:1 brightness asymmetry between the NW and SE extension. This specific feature makes HD 111520 the most extreme examples of asymmetric debris disks observed in scattered light among similar highly inclined systems, such as HD 15115 and HD 106906. We further identify a tentative localized brightness enhancement and scale height enhancement associated with the disk at ~40 AU away from the star on the SE extension. We also find that the fractional polarization rises from 10 to 40% from 0.5" to 0.8" from the star. The combination of large brightness asymmetry and symmetric polarization fraction leads us to believe that an azimuthal dust density variation is causing the observed asymmetry.

arXiv comment9 pages, 8 Figures, 1 table, Accepted to ApJ

References in corpus (32)

• Validation of the new Hipparcos reduction
• The Photodetector Array Camera and Spectrometer (PACS) on the Herschel Space Observatory
• A Hipparcos census of the nearby OB associations
• Angular Differential Imaging: a Powerful High-Contrast Imaging Technique
• Detection and Characterization of Exoplanets and Disks using Projections on Karhunen-Loeve Eigenimages
• Passive irradiated circumstellar disks with an inner hole
• The Gemini Planet Imager: First Light
• A Revised Age for Upper Scorpius and The Star-Formation History Among the F-Type Members of the Scorpius-Centaurus OB Association
• How Observations of Circumstellar Disk Asymmetries Can Reveal Hidden Planets: Pericenter Glow and its Application to the HR 4796 Disk
• Molecular Gas Clumps from the Destruction of Icy Bodies in the $\beta$ Pictoris Debris Disk
• Polarimetry with the Gemini Planet Imager: Methods, Performance at First Light, and the Circumstellar Ring around HR 4796A
• Debris disc stirring by secular perturbations from giant planets
• The Signature of Primordial Grain Growth in the Polarized Light of the AU Mic Debris Disk
• Resolved Debris Discs Around A Stars in the Herschel DEBRIS Survey
• $\beta$ Pictoris' inner disk in polarized light and new orbital parameters for $\beta$ Pictoris b
• Discovery of extreme asymmetry in the debris disk surrounding HD 15115
• Reconnaissance of the HR 8799 Exosolar System II: Astrometry and Orbital Motion
• A narrow, edge-on disk resolved around HD 106906 with SPHERE
• The HD 163296 Circumstellar Disk in Scattered Light: Evidence of Time-Variable Self-Shadowing
• Non-azimuthal linear polarization in protoplanetary disks
• Gemini Planet Imager Observational Calibrations I: Overview of the GPI Data Reduction Pipeline
• Gemini Planet Imager Observational Calibrations VIII: Characterization and Role of Satellite Spots
• Gemini Planet Imager Observational Calibrations V: Astrometry and Distortion
• First Scattered-Light Image of the Debris Disk around HD 131835 with the Gemini Planet Imager
• A Multiplicity Census of Intermediate-Mass Stars in Scorpius-Centaurus
• Observing planet-disk interaction in debris disks
• Is the HD 15115 inner disk really asymmetrical ?
• Gemini Planet Imager Observational Calibrations IV: Wavelength Calibration and Flexure Correction for the Integral Field Spectrograph
• Gemini Planet Imager Observational Calibrations VI: Photometric and Spectroscopic Calibration for the Integral Field Spectrograph
• Gemini Planet Imager Observational Calibrations II: Detector Performance and Calibration
• Gemini Planet Imager Observational Calibrations III: Empirical Measurement Methods and Applications of High-Resolution Microlens PSFs
• Gemini Planet Imager Observational Calibrations IX: Least-Squares Inversion Flux Extraction

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