Resolved Millimeter-Wavelength Observations of Debris Disks around Solar-Type Stars

Abstract

The presence of debris disks around young main sequence stars hints at the existence and structure of planetary systems. Millimeter-wavelength observations probe large grains that trace the location of planetesimal belts. The FEPS (Formation and Evolution of Planetary Systems) $Spitzer$ Legacy survey of nearby young solar analogues yielded a sample of five debris disk-hosting stars with millimeter flux suitable for interferometric follow-up. We present observations with the Submillimeter Array (SMA) and the Combined Array for Research in Millimeter-wave Astronomy (CARMA) at ~2" resolution that spatially resolve the debris disks around these nearby ($d\sim$50 pc) stars. Two of the five disks (HD 377, HD 8907) are spatially resolved for the first time and one (HD 104860) is resolved at millimeter wavelengths for the first time. We combine our new observations with archival SMA and Atacama Large Millimeter/Submillimeter Array (ALMA) data to enable a uniform analysis of the full five-object sample. We simultaneously model the broad-band photometric data and resolved millimeter visibilities to constrain the dust temperatures and disk morphologies, and perform an MCMC analysis to fit for basic structural parameters. We find that the radii and widths of the cold outer belts exhibit properties consistent with scaled-up versions of the Solar System's Kuiper Belt. All the disks exhibit characteristic grain sizes comparable to the blowout size, and all the resolved observations of emission from large dust grains are consistent with an axisymmetric dust distribution to within the uncertainties. These results are consistent with comparable studies carried out at infrared wavelengths.

17 pages, 5 figures, 7 tables

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Cited by in corpus (16)

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• An Empirical Planetesimal Belt Radius - Stellar Luminosity Relation
• Radial Surface Density Profiles of Gas and Dust in the Debris Disk around 49 Ceti
• Constraints on Planetesimal Collision Models in Debris Disks
• ALMA Detection of Extended Millimeter Halos in the HD 32297 and HD 61005 Debris Disks
• Circumstellar Debris Disks: Diagnosing the Unseen Perturber
• Bringing "The Moth" to Light: A Planet-Sculpting Scenario for the HD 61005 Debris Disk
• HD 104860 and HD 192758: two debris disks newly imaged in scattered-light with HST
• What Sets the Radial Locations of Warm Debris Disks?
• Dynamical models to explain observations with SPHERE in planetary systems with double debris belts
• Comprehensive analysis of HD 105, a young Solar System analog
• Relating grain size distributions in circumstellar discs to the spectral index at millimetre wavelengths
• Four new PLanetesimals Around TYpical and Pre-main seqUence Stars (PLATYPUS) Debris Discs at 8.8mm
• Multi-wavelength aperture polarimetry of debris disc host stars
• Multi-wavelength, spatially resolved modelling of HD 48682's debris disc
• Gaia-GIC-1: An Evolving Catastrophic Planetesimal Collision Candidate