A Likely Close-In Low-Mass Stellar Companion to the Transitional Disk Star HD 142527

Abstract

With the uniquely high contrast within 0.1" (Δmag(L') = 5-6.5 magnitudes) available using Sparse Aperture Masking (SAM) with NACO at VLT, we detected asymmetry in the flux from the Herbig Fe star HD 142527 with a barycenter emission situated at a projected separation of 88+/-5 mas (12.8+/-1.5 AU at 145 pc) and flux ratios in H, K, and L' of 0.016+/-0.007, 0.012+/-0.008, 0.0086+/-0.0011 respectively (3-σerrors) relative to the primary star and disk. After extensive closure-phase modeling, we interpret this detection as a close-in, low-mass stellar companion with an estimated mass of ~0.1-0.4 M_Sun. HD 142527 has a complex disk structure, with an inner gap imaged in both the near and mid-IR as well as a spiral feature in the outer disk in the near-IR. This newly detected low-mass stellar companion may provide a critical explanation of the observed disk structure.

Accepted to ApJ Letters, 7 pages, 3 figures

References in corpus (4)

• Demographics of Transition Objects
• LkH$\alpha$ 330: Evidence for dust clearing through resolved submillimeter imaging
• Planet Formation in Binary Stars: The case of Gamma Cephei
• Geometrical and Physical Properties of Circumbinary Discs in Eccentric Stellar Binaries

Cited by in corpus (128)

• Gaps, Rings, and Non-Axisymmetric Structures in Protoplanetary Disks - From Simulations to ALMA Observations
• Imaging Extrasolar Giant Planets
• Observational Signatures of Planets in Protoplanetary Disks I: Gaps Opened by Single and Multiple Young Planets in Disks
• Shadows cast by a warp in the HD 142527 protoplanetary disk
• Spiral Arms in the Asymmetrically Illuminated Disk of MWC 758 and Constraints on Giant Planets
• Structures in the protoplanetary disk of HD142527 seen in polarized scattered light
• Shadows and spirals in the protoplanetary disk HD 100453
• Gaia DR2 study of Herbig Ae/Be stars
• Circumbinary, not transitional: On the spiral arms, cavity, shadows, fast radial flows, streamers and horseshoe in the HD142527 disc
• The Disk Substructures at High Angular Resolution Project (DSHARP): IV. Characterizing substructures and interactions in disks around multiple star systems
• Discovery of H-alpha Emission from the Close Companion Inside the Gap of Transitional Disk HD142527
• Can dead zones create structures like a transition disk?
• Accretion kinematics through the warped transition disk in HD142527 from resolved CO(6-5) observations
• A survey of young, nearby, and dusty stars to understand the formation of wide-orbit giant planets
• Characterization of exoplanets from their formation III: The statistics of planetary luminosities
• An Enigmatic Pointlike Feature within the HD 169142 Transitional Disk
• On the origin of horseshoes in transitional discs
• The Degree of Alignment Between Circumbinary Disks and Their Binary Hosts
• Signatures of broken protoplanetary discs in scattered light and in sub-millimetre observations
• Spiral arms in the disk of HD 142527 from CO emission lines with ALMA
• A compact concentration of large grains in the HD142527 protoplanetary dust trap
• Shadows and asymmetries in the T Tauri disk HD 143006: Evidence for a misaligned inner disk
• A stellar mass dependence of structured disks: a possible link with exoplanet demographics
• A Close-up View of the Young Circumbinary Disk HD 142527
• Exploring dust around HD142527 down to 0.025" / 4au using SPHERE/ZIMPOL
• An inner warp in the DoAr 44 T Tauri transition disk
• Inclined Massive Planets in a Protoplanetary Disc: Gap Opening, Disc Breaking, and Observational Signatures
• An M-dwarf star in the transition disk of Herbig HD 142527; Physical parameters and orbital elements
• Searching for circumplanetary disks around LkCa 15
• Diffraction-limited Visible Light Images of Orion Trapezium Cluster With the Magellan Adaptive Secondary AO System (MagAO)
• Scattered light images of spiral arms in marginally gravitationally unstable discs with an embedded planet
• The dynamically disrupted gap in HD 142527
• Near-Infrared Imaging Polarimetry of HD142527
• Fast Radial Flows in Transition Disk Holes
• Cloudlet capture by Transitional Disk and FU Orionis stars
• An Optical/near-infrared investigation of HD 100546 b with the Gemini Planet Imager and MagAO
• A search for accreting young companions embedded in circumstellar disks: High-contrast H$\alpha$ imaging with VLT/SPHERE
• The (w)hole survey: an unbiased sample study of transition disk candidates based on Spitzer catalogs
• Two Different Grain Size Distributions within the Protoplanetary Disk around HD 142527 Revealed by ALMA Polarization Observation
• The origin and evolution of transition discs: successes, problems and open questions
• Investigation of the inner structures around HD169142 with VLT/SPHERE
• Millimetre spectral indices of transition disks and their relation to the cavity radius
• Sequential planet formation in the HD 100546 protoplanetary disk?
• Planet or Brown Dwarf? Inferring the Companion Mass in HD 100546 from the Wall Shape using Mid-Infrared Interferometry
• Shadowing and multiple rings in the protoplanetary disk of HD 139614
• The SEEDS High Contrast Imaging Survey of Exoplanets around Young Stellar Objects
• Polycyclic Aromatic Hydrocarbon in Protoplanetary Disks around Herbig Ae/Be and T Tauri Stars
• High Contrast Imaging of the Close Environment of HD 142527 -
• The widest H$\alpha$ survey of accreting protoplanets around nearby transition disks
• Shallow Cavities in Multiple-Planet Systems
• Separating extended disc features from the protoplanet in PDS 70 using VLT/SINFONI
• A population of transition disks around evolved stars: Fingerprints of planets? Catalog of disks surrounding Galactic post-AGB binaries
• Resolving the gap and AU-scale asymmetries in the pre-transitional disk of V1247 Orionis
• Signatures of an eccentric disc cavity: Dust and gas in IRS 48
• Gaps in Protoplanetary Disks as Signatures of Planets: II. Inclined Disks
• Dipper disks not inclined towards edge-on orbits
• SPHERE dynamical and spectroscopic characterization of HD142527B
• Polarized Light Imaging of the HD 142527 Transition Disk with the Gemini Planet Imager: Dust around the Close-in Companion
• Resolving structure of the disk around HD100546 at 7 mm with ATCA
• Generating large misalignments in gapped and binary discs
• ALMA Reveals a Misaligned Inner Gas Disk inside the Large Cavity of a Transitional Disk
• Stability and Occurrence Rate Constraints on the Planetary Sculpting Hypothesis for "Transitional" Disks
• Stellar parameters and accretion rate of the transition disk star HD 142527 from X-Shooter
• Significant Gas-to-Dust Ratio Asymmetry and Variation in the Disk of HD 142527 and the Indication of Gas Depletion
• Directly observing continuum emission from self-gravitating spiral waves
• VLTI/MIDI atlas of disks around low- and intermediate-mass young stellar objects
• The abundance and thermal history of water ice in the disk surrounding HD142527 from the DIGIT Herschel Key Program
• Comparing Non-Redundant Masking and Filled-Aperture Kernel Phase for Exoplanet Detection and Characterization
• HD142527: Quantitative disk polarimetry with SPHERE
• Vortex-like kinematic signal, spirals, and beam smearing effect in the HD 142527 disk
• The Planetary Luminosity Problem: "Missing Planets" and the Observational Consequences of Episodic Accretion
• The Giant Accreting Protoplanet Survey (GAPlanetS) -- Results from a Six Year Campaign to Image Accreting Protoplanets
• Cm-wavelength observations of MWC758: resolved dust trapping in a vortex
• A Gaia Survey for Young Stars Associated with the Lupus Clouds
• Characterizing the protolunar disk of the accreting companion GQ Lupi B
• Consistent dust and gas models for protoplanetary disks IV. A panchromatic view of protoplanetary disks
• Circumbinary and circumstellar discs around the eccentric binary IRAS 04158+2805 -- a testbed for binary-disc interaction
• What happened before? -- The disks around the precursors of young Herbig Ae/Be stars
• Non-Keplerian spirals, a gas-pressure dust trap and an eccentric gas cavity in the circumbinary disc around HD 142527
• Rocking shadows in broken circumbinary discs
• Dusty clumps in circumbinary discs
• The Architecture of the GW Ori Young Triple Star System and Its Disk: Dynamical Masses, Mutual Inclinations, and Recurrent Eclipses
• Characterization of low-mass companion HD 142527 B
• Binary-induced spiral arms inside the disc cavity of AB Aurigae
• A "Rosetta Stone" for protoplanetary disks: The synergy of multi-wavelength observations
• ISPY-NACO Imaging Survey for Planets around Young stars. The demographics of forming planets embedded in protoplanetary disks
• Detection of water vapor in the terrestrial planet forming region of a transition disk
• Resolved observations of transition disks
• Investigating the asymmetric chemistry in the disk around the young star HD 142527
• The far-infrared behaviour of Herbig Ae/Be discs: Herschel PACS photometry
• The protoplanetary system HD 100546 in H$\alpha$ polarized light from SPHERE/ZIMPOL. A bar-like structure across the disk gap?
• Observational signatures of linear warps in circumbinary discs
• Low Level Carbon Monoxide Line Polarization in two Protoplanetary Disks: HD 142527 and IM Lup
• Near-IR imaging of T Cha: evidence for scattered-light disk structures at solar system scales
• Investigating the gas-to-dust ratio in the protoplanetary disk of HD 142527
• Chemical signatures of a warped protoplanetary disc
• Searching for spectroscopic binaries within transition disk objects
• Super-resolution Imaging of the Protoplanetary Disk HD 142527 Using Sparse Modeling
• Kinematical signs of dust trapping and feedback in a local pressure bump in the protoplanetary disk around HD 142527 revealed with ALMA
• An asymmetric dust ring around a very low mass star ZZ Tau IRS
• Interferometric study on the temporal variability of the brightness distributions of protoplanetary disks
• Herbig AeBe stars: Multiplicity and consequences
• Dynamical signatures of Rossby vortices in cavity-hosting disks
• Data Reduction and Image Reconstruction Techniques for Non-Redundant Masking
• Detailed modeling of dust distribution in the disk of HD 142527
• The Giant Accreting Protoplanet Survey (GAPlanetS): Optimization Techniques for Robust Detections of Protoplanets
• On the frequencies of circumbinary discs in protostellar systems
• New Spatially Resolved Imaging of the SR 21 Transition Disk and Constraints on the Small-Grain Disk Geometry
• High-contrast imaging constraints on gas giant planet formation - The Herbig Ae/Be star opportunity
• Imaging the disc rim and a moving close-in companion candidate in the pre-transitional disc of V1247 Orionis
• The protoplanetary disc around HD 169142: circumstellar or circumbinary?
• Improved Constraints on the Disk Around MWC 349A from the 23-Meter LBTI
• Search for substellar-mass companions and asymmetries in their parent discs
• Observational Signatures of Circumbinary Discs I: Kinematics
• A Dust Trap in the Young Multiple System HD 34700
• A Study of Ro-vibrational OH Emission from Herbig Ae/Be Stars
• On the nature of the azimuthal asymmetry of protoplanetary disks observed pole-on. The case LkHa 101
• Gemini Planet imager Observational Calibrations X: Non-Redundant Masking on GPI
• Mid-infrared Multi-wavelength Imaging of Ophiuchus\,IRS\,48\,Transitional Disk
• Infrared Variability from Circumbinary Disc Temperature Modulations
• Planet-forming disks and their environment across regions and time from the full NIR census
• Performance of the Gemini Planet Imager Non-Redundant Mask and spectroscopy of two close-separation binaries HR 2690 and HD 142527
• Polarimetric differential imaging with VLT/NACO. A comprehensive PDI pipeline for NACO data (PIPPIN)
• On the cavity size in circumbinary discs
• The asymmetric structure of the inner disc around HD 142527 A with VLTI/MATISSE
• The SPHERE view of multiple star formation
• The Circumbinary Disc of HD 34700A II. Analysis of a strong dust asymmetry
• Longterm Stability of Planetary Systems formed from a Transitional Disk