Sensitive Identification of Nearby Debris Disks via Precise Calibration of WISE Data
نویسندگان
چکیده
منابع مشابه
Debris Disks around Nearby Stars with Circumstellar Gas
We conducted a survey for infrared excess emission from 16 nearby main sequence shell stars using the Multiband Imaging Photometer for Spitzer (MIPS) on the Spitzer Space Telescope. Shell stars are early-type stars with narrow absorption lines in their spectra that appear to arise from circumstellar (CS) gas. Four of the 16 stars in our survey showed excess emission at 24 μm and 70 μm character...
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The appearance of debris disks around distant stars depends upon the scattering/phase function (SPF) of the material in the disk. However, characterizing the SPFs of these extrasolar debris disks is challenging because only a limited range of scattering angles are visible to Earth-based observers. By contrast, Saturn’s tenuous rings can be observed over a much broader range of geometries, so th...
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Using the MIPS instrument on Spitzer, we have searched for infrared excesses around a sample of 82 stars, mostly F, G, andKmain-sequence field stars, alongwith a small number of nearbyM stars. These stars were selected for their suitability for future observations by a variety of planet-finding techniques. These observations provide information on the asteroidal and cometary material orbiting t...
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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...
متن کاملImaging Circumstellar Debris Disks
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...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2015
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921315006122