Kuiper Belts Around Nearby Stars
R. Nilsson (1), R. Liseau (2), A. Brandeker (1), G. Olofsson (1), G., L. Pilbratt (3), C. Risacher (4), J. Rodmann (5), J.-C. Augereau (6), P., Bergman (2), C. Eiroa (7), M. Fridlund (3), P. Th\'ebault (8,1), G. J. White, (9,10) ((1) Department of Astronomy, Stockholm University

TL;DR
This study uses submillimetre observations to detect and analyze cold debris disks around nearby stars, revealing dust properties, disk evolution, and new detections at Kuiper Belt distances, advancing understanding of planetary system development.
Contribution
First submillimetre survey of 22 nearby stars' debris disks, providing new detections and insights into dust properties and disk evolution.
Findings
10 detections with >3-sigma significance, including 5 new at submillimetre wavelengths.
Dust grain sizes larger than interstellar medium grains, indicated by beta values between 0.1 and 0.8.
Dust mass and radial distance evolve with stellar age, consistent with self-stirred collision models.
Abstract
In order to detect and characterise cold extended circumstellar dust originating from collisions of planetesimal bodies in disks, belts, or rings at Kuiper-Belt distances (30-50 AU or beyond) sensitive submillimetre observations are essential. Measurements of the flux densities at these wavelengths will extend existing IR photometry and permit more detailed modelling of the Rayleigh-Jeans tail of the disks spectral energy distribution (SED), effectively constraining dust properties and disk extensions. By observing stars spanning from a few up to several hundred Myr, the evolution of debris disks during crucial phases of planet formation can be studied. We have performed 870-micron observations of 22 exo-Kuiper-Belt candidates, as part of a Large Programme with the LABOCA bolometer at the APEX telescope. Dust masses (or upper limits) were calculated from integrated 870-micron fluxes,…
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