ALMA Images the Eccentric HD 53143 Debris Disk

Abstract

We present ALMA 1.3 mm observations of the HD~53143 debris disk - the first infrared or millimeter image produced of this ~1 Gyr-old solar-analogue. Previous HST STIS coronagraphic imaging did not detect flux along the minor axis of the disk which could suggest a face-on geometry with two 'clumps' of dust. These ALMA observations reveal a disk with a strikingly different structure. In order to fit models to the millimeter visibilities and constrain the uncertainties on the disk parameters, we adopt an MCMC approach. This is the most eccentric debris disk observed to date with a forced eccentricity of $0.21\pm 0.02$, nearly twice that of the Fomalhaut debris disk, and also displays apocenter glow. Although this eccentric model fits the outer debris disk well, there are significant interior residuals remaining that may suggest a possible edge-on inner disk, which remains unresolved in these observations. Combined with the observed structure difference between HST and ALMA, these results suggest a potential previous scattering event or dynamical instability in this system. We also note that the stellar flux changes considerably over the course of our observations, suggesting flaring at millimeter wavelengths. Using simultaneous TESS observations, we determine the stellar rotation period to be $9.6\pm 0.1$ days.

9 pages, 3 figures, 2 tables, published in ApJ Letters

References in corpus (15)

• astroquery: An Astronomical Web-Querying Package in Python
• Probing for Exoplanets Hiding in Dusty Debris Disks: Disk Imaging, Characterization, and Exploration with HST/STIS Multi-Roll Coronagraphy
• Nearby debris disk systems with high fractional luminosity reconsidered
• exoplanet: Gradient-based probabilistic inference for exoplanet data & other astronomical time series
• A Temporary Epoch of Stalled Spin-Down for Low-Mass Stars: Insights from NGC 6811 with Gaia and Kepler
• A Complete ALMA Map of the Fomalhaut Debris Disk
• ALMA observations of the $\eta$ Corvi debris disc: inward scattering of CO-rich exocomets by a chain of 3-30 M${}_{\oplus }$ planets?
• First scattered light images of debris disks around HD 53143 and HD 139664
• A Direct Imaging Survey of Spitzer detected debris disks: Occurrence of giant planets in dusty systems
• Planet populations inferred from debris discs: insights from 178 debris systems in the ISPY, LEECH and LIStEN planet-hunting surveys
• Apocenter glow in eccentric debris disks: implications for Fomalhaut and epsilon Eridani
• ALMA Detection of Extended Millimeter Halos in the HD 32297 and HD 61005 Debris Disks
• The unexpected narrowness of eccentric debris rings: a sign of eccentricity during the protoplanetary disc phase
• Resonant Kuiper Belt Objects -- a Review
• Eccentric debris disc morphologies I: exploring the origin of apocentre and pericentre glows in face-on debris discs

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• Eccentric debris disc morphologies II: Surface brightness variations from overlapping orbits in narrow eccentric discs
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• Characterization of debris disks observed with SPHERE
• A catalog of collected debris disks: properties, classifications and correlations between disks and stars/planets
• The apparent absence of forward scattering in the HD 53143 debris disk
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