The Sun ’ S Dust Disk
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The Nature of Mid-Infrared Excesses From Hot Dust Around Sun-like Stars
Aims. Studies of the debris disk phenomenon have shown that most systems are analogous to the Edgeworth-Kuiper Belt (EKB). However a rare subset of sun-like stars possess dust which lies, in contrast, in the terrestrial planet region. In this study we aim to determine how many sources with apparent mid-infrared excess are truly hosts of warm dust, and investigate where the dust in these
متن کاملThe Evolution of Debris Disk Systems: Constraints from Theory and Observation
Debris disks are believed to be the remnants of planet formation; a disk of solid bodies called planetesimals that did not get incorporated into planets. They provide an ideal opportunity for studying the outcome of planet formation in their systems. The best studied disks exhibit cool emission peaking at ≥ 60μm, lying in Edgeworth-Kuiper belt-like regions with an inner dust-free hole. However ...
متن کاملPhotophoretic Structuring of Circumstellar Dust Disks
We study dust accumulation by photophoresis in optically thin gas disks. Using formulae of the photophoretic force that are applicable for the free molecular regime and for the slip-flow regime, we calculate dust accumulation distances as a function of the particle size. It is found that photophoresis pushes particles (smaller than 10 cm) outward. For a Sun-like star, these particles are transp...
متن کاملResolved Millimeter-wavelength Observations of Debris Disks around Sun-like Stars
The presence of debris disks around young main sequence stars hints at the existence and structure of hidden planetary systems. Spatially resolved observations are crucial to characterize the structure of the dust disk. 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 ...
متن کاملTransience of Hot Dust around Sun-like Stars
There is currently debate over whether the dust content of planetary systems is stochastically regenerated or originates in planetesimal belts evolving in quasi-steady state. In this paper a simple model for the steady state evolution of debris disks due to collisions is developed and confronted with the properties of the emerging population of 7 sun-like stars that have hot dust at < 10 AU. Th...
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