ALMA Measurements of Circumstellar Material in the GQ Lup System

Abstract

We present ALMA observations of the GQ Lup system, a young Sun-like star with a substellar mass companion in a wide-separation orbit. These observations of 870 $\mu$m continuum and CO J=3-2 line emission with beam size $\sim 0.3^{\prime \prime }$ ($\sim 45$ AU) resolve the disk of dust and gas surrounding the primary star, GQ Lup A, and provide deep limits on any circumplanetary disk surrounding the companion, GQ Lup b. The circumprimary dust disk is compact with a FWHM of $59\pm 12$ AU, while the gas has a larger extent with a characteristic radius of $46.5\pm 1.8$ AU. By forward-modeling the velocity field of the circumprimary disk based on the CO emission, we constrain the mass of GQ Lup A to be $M_{\ast }=(1.03\pm 0.05)\ast (d/156\text{ pc})$ $M_{\odot }$, where $d$ is a known distance, and determine that we view the disk at an inclination angle of $60.5^{\circ }\pm 0.5^{\circ }$ and a position angle of $346^{\circ }\pm 1^{\circ }$. The $3\sigma$ upper limit on the 870 $\mu$m flux density of any circumplanetary disk associated with GQ Lup b of $<0.15$ mJy implies an upper limit on the dust disk mass of $<0.04$ $M_{\oplus }$ for standard assumptions about optically thin emission. We discuss proposed mechanisms for the formation of wide-separation substellar companions given the non-detection of circumplanetary disks around GQ Lup b and other similar systems.

arXiv comment11 pages, 4 figures

References in corpus (62)

• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• Rapid growth of gas-giant cores by pebble accretion
• The Formation of a Star Cluster: Predicting the Properties of Stars and Brown Dwarfs
• The Mass Dependence Between Protoplanetary Disks and their Stellar Hosts
• Stellar, brown dwarf and multiple star properties from a radiation hydrodynamical simulation of star cluster formation
• An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
• The fast spin-rotation of a young extrasolar planet
• X-Shooter spectroscopy of young stellar objects: IV -- Accretion in low-mass stars and sub-stellar objects in Lupus
• The Runts of the Litter: Why planets formed through gravitational instability can only be failed binary stars
• A Parametric Modeling Approach to Measuring the Gas Masses of Circumstellar Disks
• The Two Modes of Gas Giant Planet Formation
• The Formation of Low-Mass Binary Star Systems Via Turbulent Fragmentation
• Clumps in the Outer Disk by Disk Instability: Why They are Initially Gas Giants and the Legacy of Disruption
• Giant Planet Companion to 2MASSW J1207334-393254
• Evidence for a co-moving sub-stellar companion of GQ Lup
• Direct Imaging and Spectroscopy of a Planetary Mass Candidate Companion to a Young Solar Analog
• A Spatially Resolved Vertical Temperature Gradient in the HD 163296 Disk
• The structure and dynamics of molecular gas in planet-forming zones: A CRIRES spectro-astrometric survey
• Two Wide Planetary-Mass Companions to Solar-Type Stars in Upper Scorpius
• Circumplanetary disc properties obtained from radiation hydrodynamical simulations of gas accretion by protoplanets
• Circumplanetary disk or circumplanetary envelope?
• Three Wide Planetary-Mass Companions to FW Tau, ROXs 12, and ROXs 42B
• Planetary Construction Zones in Occultation: Discovery of an Extrasolar Ring System Transiting a Young Sun-like Star and Future Prospects for Detecting Eclipses by Circumsecondary and Circumplanetary Disks
• Tidal Truncation of Circumplanetary Discs
• Formation, Habitability, and Detection of Extrasolar Moons
• On the Distance to the Ophiuchus Star-Forming Region
• Discovery of a Young Substellar Companion in Chamaeleon
• Accretion onto Planetary Mass Companions of Low-Mass Young Stars
• Long range outward migration of giant planets, with application to Fomalhaut b
• A Disk Around the Planetary-Mass Companion GSC 06214-00210 b: Clues About the Formation of Gas Giants on Wide Orbits
• Formation and survivability of giant planets on wide orbits
• Direct evidence of a sub-stellar companion around CT Cha
• Magnetometry of the classical T Tauri star GQ Lup: non-stationary dynamos & spin evolution of young Suns
• VLBA determination of the distance to nearby star-forming regions V. Dynamical mass, distance and radio structure of V773 Tau A
• Searching for circumplanetary disks around LkCa 15
• Brown dwarf disks with ALMA
• Spectroscopic Confirmation of Young Planetary-Mass Companions on Wide Orbits
• A Turbulent Interstellar Medium Origin of the Binary Period Distribution
• On the Formation of Gas Giant Planets on Wide Orbits
• Long period planets from dynamical relaxation
• A Disk-based Dynamical Mass Estimate for the Young Binary V4046 Sgr
• Astrometric follow-up observations of directly imaged sub-stellar companions to young stars and brown dwarfs
• Dust masses of disks around 8 Brown Dwarfs and Very Low-Mass Stars in Upper Sco OB1 and Ophiuchus
• The properties of discs around planets and brown dwarfs as evidence for disc fragmentation
• An ALMA Disk Mass for the Candidate Protoplanetary Companion to FW Tau
• A Disk-based Dynamical Constraint on the Mass of the Young Binary DQ Tau
• Astrometric and photometric monitoring of GQ Lup and its sub-stellar companion
• GQ Lup B Visible & Near-Infrared Photometric Analysis
• Near-IR integral-field spectroscopy of the companion to GQ Lup
• Searching for Scatterers: High-Contrast Imaging of Young Stars Hosting Wide-Separation Planetary-Mass Companions
• The low-mass companion of GQ Lup
• Constraining the orbits of sub-stellar companions imaged over short orbital arcs
• Millimeter Dust Emission in the GQ Lup System
• A Thermal Infrared Imaging Study of Very Low-Mass, Wide Separation Brown Dwarf Companions to Upper Scorpius Stars: Constraining Circumstellar Environments
• An ALMA Constraint on the GSC 6214-210 B Circum-Substellar Accretion Disk Mass
• Steepening of the 820 micron continuum surface-brightness profile signals dust evolution in TW Hya's disk
• Searching for Gas-Rich Disks around T Tauri Stars in Lupus
• Near Infrared Observations of GQ Lup b Using the Gemini Integral Field Spectrograph NIFS
• GQ Lup and its common proper motion companion
• An ALMA Survey for Disks Orbiting Low-Mass Stars in the TW Hya Association
• On the Formation of Brown Dwarfs
• The Origins of the Substellar Companion to GQ Lup

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