Debris Disks: Structure, Composition, and Variability
نویسندگان
چکیده
منابع مشابه
Modeling the spatial structure of debris disks
We present high spatial resolution observations and detailed multi-wavelength modeling of the structure and composition of two prominent debris disks and a systematic study on the observability of planet-disk interaction in debris disks with present and future instruments. As the spatial structure of debris disks is, in addition to stellar gravity and radiation, mainly influenced by planet-disk...
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In the early 1980s, the Infrared Astronomy Satellite (IRAS) detected thermal emission from dust grains with temperatures of 50-125 K and fractional luminosities (Lgrains/L∗) in the range 10 -10 around four main sequence stars: Vega, Fomalhaut, β Pictoris, and ǫ Eridani. Coronagraphic observations of β Pic confirmed that the grains do indeed lie in a disk, perhaps associated with a young planeta...
متن کاملCollisional Grooming of Debris Disks
Debris disk images show clumps, rings, warps, and other structures, many of which have been interpreted as perturbations from hidden planets. But so far, no models of these structures have properly accounted for collisions between dust grains. We have developed new steady-state 3D models of debris disks that self-consistently incorporate grain-grain collisions. We summarize our algorithm and us...
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We have surveyed the 30 Myr-old cluster NGC 2547 for planetary debris disks using Spitzer. At 4.5–8 μm we are sensitive to the photospheric level down to mid-M stars (0.2 M⊙) and at 24 μm to early-G stars (1.2 M⊙). We find only two to four stars with excesses at 8 μm out of ∼400–500 cluster members, resulting in an excess fraction .1% at this wavelength. By contrast, the excess fraction at 24 μ...
متن کاملThe Kuiper Belt and Other Debris Disks
We discuss the current knowledge of the Solar system, focusing on bodies in the outer regions, on the information they provide concerning Solar system formation, and on the possible relationships that may exist between our system and the debris disks of other stars. Beyond the domains of the Terrestrial and giant planets, the comets in the Kuiper belt and the Oort cloud preserve some of our mos...
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ژورنال
عنوان ژورنال: Annual Review of Astronomy and Astrophysics
سال: 2018
ISSN: 0066-4146,1545-4282
DOI: 10.1146/annurev-astro-081817-052035