Keck/NIRC2 $L$'-Band Imaging of Jovian-Mass Accreting Protoplanets around PDS 70

Abstract

We present $L$'-band imaging of the PDS 70 planetary system with Keck/NIRC2 using the new infrared pyramid wavefront sensor. We detected both PDS 70 b and c in our images, as well as the front rim of the circumstellar disk. After subtracting off a model of the disk, we measured the astrometry and photometry of both planets. Placing priors based on the dynamics of the system, we estimated PDS 70 b to have a semi-major axis of $20_{-4}^{+3}$~au and PDS 70 c to have a semi-major axis of $34_{-6}^{+12}$~au (95\% credible interval). We fit the spectral energy distribution (SED) of both planets. For PDS 70 b, we were able to place better constraints on the red half of its SED than previous studies and inferred the radius of the photosphere to be 2-3~$R_{Jup}$. The SED of PDS 70 c is less well constrained, with a range of total luminosities spanning an order of magnitude. With our inferred radii and luminosities, we used evolutionary models of accreting protoplanets to derive a mass of PDS 70 b between 2 and 4 $M_{\text{Jup}}$ and a mean mass accretion rate between $3\times 10^{-7}$ and $8\times 10^{-7}{M}_{\text{Jup}}/\text{yr}$. For PDS 70 c, we computed a mass between 1 and 3 $M_{\text{Jup}}$ and mean mass accretion rate between $1\times 10^{-7}$ and $5\times 10^{-7}{M}_{\text{Jup}}/\text{yr}$. The mass accretion rates imply dust accretion timescales short enough to hide strong molecular absorption features in both planets' SEDs.

arXiv comment20 pages, 5 figures, Accepted to AJ. Updated author list from original version. Fixed equation typo

References in corpus (81)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• A Non-Gray Theory of Extrasolar Giant Planets and Brown Dwarfs
• Angular Differential Imaging: a Powerful High-Contrast Imaging Technique
• Models of Stars, Brown Dwarfs and Exoplanets
• Detection and Characterization of Exoplanets and Disks using Projections on Karhunen-Loeve Eigenimages
• Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70
• On the Luminosity of Young Jupiters
• Line and Mean Opacities for Ultracool Dwarfs and Extrasolar Planets
• Two accreting protoplanets around the young star PDS 70
• The Star-formation History and Accretion-Disk Fraction Among the K-Type Members of the Scorpius-Centaurus OB Association
• Monte Carlo radiative transfer in protoplanetary disks
• Accretion in Brown Dwarfs: an Infrared View
• The 0.8-14.5 micron Spectra of Mid-L to Mid-T Dwarfs: Diagnostics of Effective Temperature, Grain Sedimentation, Gas Transport, and Surface Gravity
• Fundamental Parameters and Spectral Energy Distributions of Young and Field Age Objects with Masses Spanning the Stellar to Planetary Regime
• Clouds and Chemistry in the Atmosphere of Extrasolar Planet HR8799b
• Benchmark problems for continuum radiative transfer. High optical depths, anisotropic scattering, and polarisation
• LkCa 15: A Young Exoplanet Caught at Formation?
• Dynamic temperature selection for parallel-tempering in Markov chain Monte Carlo simulations
• Accreting Protoplanets in the LkCa 15 Transition Disk
• Masses, Radii, and Cloud Properties of the HR 8799 Planets
• SCUBA-2: on-sky calibration using submillimetre standard sources
• Orbital and atmospheric characterization of the planet within the gap of the PDS 70 transition disk
• Synthetic Spectra and Colors of Young Giant Planet Atmospheres: Effects of Initial Conditions and Atmospheric Metallicity
• The Hawaii Infrared Parallax Program. II. Young Ultracool Field Dwarfs
• The Extremely Red, Young L Dwarf PSO J318-22: A Free-Floating Planetary-Mass Analog to Directly Imaged Young Gas-Giant Planets
• A Patchy Cloud Model for the L to T Dwarf Transition
• On the Minimum Core Mass for Giant Planet Formation at Wide Separations
• A young protoplanet candidate embedded in the circumstellar disk of HD100546
• Formation of Jupiter using opacities based on detailed grain physics
• Submillimeter emission associated with candidate protoplanets
• X-shooter spectroscopy of young stellar objects: I - Mass accretion rates of low-mass T Tauri stars in σOrionis
• Accreting Circumplanetary Disks: Observational Signatures
• Detection and Characterization of Exoplanets using Projections on Karhunen-Loeve Eigenimages: Forward Modeling
• Polarimetric Imaging of Large Cavity Structures in the Pre-transitional Protoplanetary Disk around PDS 70: Observations of the disk
• Magellan Adaptive Optics Imaging of PDS 70: Measuring the Mass Accretion Rate of a Young Giant Planet within a Gapped Disk
• Highly structured disk around the planet host PDS 70 revealed by high-angular resolution observations with ALMA
• Spectral and atmospheric characterization of 51 Eridani b using VLT/SPHERE
• Substructure in the Circumstellar Disk around the Young Star AU Mic (GJ 803)
• Consistent simulations of substellar atmospheres and non-equilibrium dust-cloud formation
• orbitize!: A Comprehensive Orbit-fitting Software Package for the High-contrast Imaging Community
• Resolving the HD 100546 Protoplanetary System with the Gemini Planet Imager: Evidence for Multiple Forming, Accreting Planets
• First light of the VLT planet finder SPHERE. IV. Physical and chemical properties of the planets around HR8799
• Dynamical Constraints on the HR 8799 Planets with GPI
• Constructing A Flexible Likelihood Function For Spectroscopic Inference
• An Atmospheric Structure Equation for Grain Growth
• Characterizing 51 Eri b from 1-5 $\mu$m: a partly-cloudy exoplanet
• Final Masses of Giant Planets II: Jupiter Formation in a Gas-Depleted Disk
• Characterization of exoplanets from their formation III: The statistics of planetary luminosities
• Minimum Core Masses for Giant Planet Formation With Realistic Equations of State and Opacities
• Grain opacity and the bulk composition of extrasolar planets. II. An analytical model for the grain opacity in protoplanetary atmospheres
• Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO
• Sedimentation Efficiency of Condensation Clouds in Substellar Atmospheres
• Optical imaging polarimetry of the LkCa 15 protoplanetary disk with SPHERE ZIMPOL
• Spectroscopic characterization of HD 95086 b with the Gemini Planet Imager
• The Structure of Pre-transitional Protoplanetary Disks. II. Azimuthal Asymmetries, Different Radial Distributions of Large and Small Dust Grains in PDS~70
• VLT/SPHERE exploration of the young multiplanetary system PDS70
• An Optical/near-infrared investigation of HD 100546 b with the Gemini Planet Imager and MagAO
• Evidence for a circumplanetary disk around protoplanet PDS 70 b
• Theoretical Model of Hydrogen Line Emission from Accreting Gas Giants
• Accretion Properties of PDS 70b with MUSE
• Reference star differential imaging of close-in companions and circumstellar disks with the NIRC2 vortex coronagraph at W.M. Keck Observatory
• The W. M. Keck Observatory infrared vortex coronagraph and a first image of HIP79124 B
• The Measurement, Treatment, and Impact of Spectral Covariance and Bayesian Priors in Integral-Field Spectroscopy of Exoplanets
• The extremely red L dwarf ULAS J222711$-$004547 - dominated by dust
• Magnetospheric Accretion as a Source of H$\alpha$ Emission from Proto-planets around PDS 70
• Observability of Forming Planets and their Circumplanetary Disks II. -- SEDs and Near-Infrared Fluxes
• Characterizing the performance of the NIRC2 vortex coronagraph at W.M. Keck Observatory
• On the Composition of Young, Directly Imaged Giant Planets
• SCExAO/CHARIS Near-Infrared Direct Imaging, Spectroscopy, and Forward-Modeling of kappa And b: A Likely Young, Low-Gravity Superjovian Companion
• Separating extended disc features from the protoplanet in PDS 70 using VLT/SINFONI
• An Exo-Kuiper Belt and An Extended Halo around HD 191089 in Scattered Light
• On-sky performance of the QACITS pointing control technique with the Keck/NIRC2 vortex coronagraph
• Evidence that the Directly-Imaged Planet HD 131399 Ab is a Background Star
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• Spectro-astrometry of the pre-transitional star LkCa 15 does not reveal an accreting planet but extended H$\alpha$ emission
• Young Jupiters are Faint: New Models of the Early Evolution of Giant Planets
• Optimizing the subwavelength grating of L-band Annular Groove Phase Masks for high coronagraphic performance
• The Endgame of Gas Giant Formation: Accretion Luminosity and Contraction Post-Runaway

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• Efficiently Imaging Accreting Protoplanets from Space: Reference Star Differential Imaging of the PDS 70 Planetary System using the HST/WFC3 Archival PSF Library
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• Self-consistent modelling of the dust component in protoplanetary and circumplanetary disks: the case of PDS 70
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