Near-Infrared Polarization from Unresolved Disks Around Brown Dwarfs and Young Stellar Objects

Abstract

Wide-field near-infrared (NIR) polarimetry was used to examine disk systems around two brown dwarfs (BD) and two young stellar objects (YSO) embedded in the Heiles Cloud 2 (HCl2) dark molecular cloud in Taurus as well as numerous stars located behind HCl2. Inclined disks exhibit intrinsic NIR polarization due to scattering of photospheric light which is detectable even for unresolved systems. After removing polarization contributions from magnetically aligned dust in HCl2 determined from the background star information, significant intrinsic polarization was detected from the disk systems of of one BD (ITG~17) and both YSOs (ITG~15, ITG~25), but not from the other BD (2M0444). The ITG~17 BD shows good agreement of the disk orientation inferred from the NIR and from published ALMA dust continuum imaging. ITG~17 was also found to reside in a 5,200~au wide binary (or hierarchical quad star system) with the ITG~15 YSO disk system. The inferred disk orientations from the NIR for ITG~15 and ITG~17 are parallel to each other and perpendicular to the local magnetic field direction. The multiplicity of the system and the large BD disk nature could have resulted from formation in an environment characterized by misalignment of the magnetic field and the protostellar disks.

arXiv comment34 pages, 13 figures, accepted for publication in The Astrophysical Journal

References in corpus (60)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Gaia mission
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• The K2 Mission: Characterization and Early results
• The VizieR database of Astronomical Catalogues
• The Mass Dependence Between Protoplanetary Disks and their Stellar Hosts
• Radiative torques: Analytical Model and Basic Properties
• The Disk Population of the Taurus Star-Forming Region
• Observations of Protoplanetary Disk Structures
• Asymmetric features in the protoplanetary disk MWC758
• Water in star-forming regions with Herschel (WISH): II. Evolution of 557 GHz 110-101 emission in low-mass protostars
• The relation between gas and dust in the Taurus Molecular Cloud
• Structures in the protoplanetary disk of HD142527 seen in polarized scattered light
• The Formation and Early Evolution of Low-mass Stars and Brown Dwarfs
• Lifting the Dusty Veil With Near- and Mid-Infrared Photometry: I. Description and Applications of the Rayleigh-Jeans Color Excess Method
• Characterizing young protostellar disks with the CALYPSO IRAM-PdBI survey: large Class 0 disks are rare
• The Magnetic Field in Taurus Probed by Infrared Polarization
• Structure and kinematics of the Taurus star-forming region from Gaia-DR2 and VLBI astrometry
• The Stellar Membership of the Taurus Star-forming Region
• The Five College Radio Astronomy Observatory CO Mapping Survey of the Taurus Molecular Cloud
• Decoupling of Magnetic Fields in Collapsing Protostellar Envelopes and Disk Formation and Fragmentation
• Evolution of protoplanetary disks from their taxonomy in scattered light: spirals, rings, cavities, and shadows
• Resolved young binary systems and their disks
• Shadows and asymmetries in the T Tauri disk HD 143006: Evidence for a misaligned inner disk
• The Spectrum of the Diffuse Galactic Light I: The Milky Way in Scattered Light
• Brown dwarf disks with ALMA
• Rotation of Low-Mass Stars in Taurus with K2
• Constraining the Envelope Structure of L1527 IRS: Infrared Scattered Light Modeling
• Near-infrared imaging polarimetry of the GG Tau circumbinary ring
• CARMA interferometric observations of 2MASS J044427+2512: the first spatially resolved observations of thermal emission of a brown dwarf disk
• Formation and Evolution of Disks around Young Stellar Objects
• Mapping H-band Scattered Light Emission in the Mysterious SR21 Transitional Disk
• The Polarizing Power of the Interstellar Medium in Taurus
• NACO Polarimetric Differential Imaging of TW Hya: A Sharp Look at the Closest T Tauri Disk
• JCMT BISTRO Survey observations of the Ophiuchus Molecular Cloud: Dust grain alignment properties inferred using a Ricean noise model
• Protoplanetary Disk Masses from Radiative Transfer Modeling: A Case Study in Taurus
• The JCMT BISTRO Survey: Magnetic Fields Associated with a Network of Filaments in NGC 1333
• Structural and compositional properties of brown dwarf disks: the case of 2MASS J04442713+2512164
• Multiplicity and clustering in Taurus star forming region. II. From ultra-wide pairs to dense NESTs
• The High-Order-Multiplicity of Unusually Wide M-dwarf Binaries: Eleven New Triple and Quadruple Systems
• Effect of Angular Momentum Alignment and Strong Magnetic Fields on the Formation of Protostellar Disks
• SMA observations of the polarized dust emission in solar-type Class 0 protostars: the magnetic field properties at envelope scales
• Multiplicity and clustering in Taurus star-forming region. I. Unexpected ultra-wide pairs of high-order multiplicity in Taurus
• Massive Star Formation via the Collapse of Subvirial and Virialized Turbulent Massive Cores
• Disc formation and fragmentation using radiative non-ideal magnetohydrodynamics
• The Pan-STARRS1 Proper-motion Survey for Young Brown Dwarfs in Nearby Star-forming Regions. I. Taurus Discoveries and a Reddening-free Classification Method for Ultracool Dwarfs
• The Taurus Boundary of Stellar/Substellar (TBOSS) Survey II. Disk Masses from ALMA Continuum Observations
• Near-infrared imaging polarimetry of dusty young stars
• Direct Imaging of the HD 35841 Debris Disk: A Polarized Dust Ring from Gemini Planet Imager and an Outer Halo from HST/STIS
• The Taurus Boundary of Stellar/Substellar (TBOSS) Survey I: far-IR disk emission measured with Herschel
• The Galactic Plane Infrared Polarization Survey (GPIPS): Data Release 4
• An observational correlation between magnetic field, angular momentum and fragmentation in the envelopes of Class 0 protostars?
• Polarimetry and flux distribution in the debris disk around HD 32297
• Identifying nearby field T dwarfs in the UKIDSS Galactic Clusters Survey
• The Magnetic Field of L1544: I. Near-Infrared Polarimetry and the Non-Uniform Envelope
• Modeling the Protoplanetary Disks of Two Brown Dwarfs in the Taurus Molecular Cloud
• No impact of core-scale magnetic field, turbulence, or velocity gradient on sizes of protostellar disks in Orion A
• Magnetic Field Uniformity Across the GF 9-2 YSO, L1082C Dense Core, and GF 9 Filamentary Dark Cloud
• Time variability in the bipolar scattered light nebula of L1527 IRS: A possible warped inner disk