Frequency of Debris Disks around Solar‐Type Stars: First Results from aSpitzerMIPS Survey
نویسندگان
چکیده
منابع مشابه
Frequency of Debris Disks around Solar-Type Stars: First Results from a Spitzer/MIPS Survey
We have searched for infrared excesses around a well defined sample of 69 FGK main-sequence field stars. These stars were selected without regard to their age, metallicity, or any previous detection of IR excess; they have a median age of ∼4 Gyr. We have detected 70 μm excesses around 7 stars at the 3-σ confidence level. This extra emission is produced by cool material (< 100 K) located beyond ...
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We have undertaken a survey for Vega–like disks around nearby main–sequence stars by making photometric measurements with ISOPHOT at four wavelengths between 25 and 180 m. Our goal is to establish how common Vega–like disks are, and how their presence depends on the fundamental properties of main–sequence stars (mass, age, rotation etc.). Here we present first results that concern Vega itself a...
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In this paper a simple analytical model for the steady-state evolution of debris disks due to collisions is confronted with Spitzer observations of dust around main sequence A stars. All stars are assumed to have planetesimal belts with a distribution of initial masses and radii. In the model disk mass is constant until the largest planetesimals reach collisional equilibrium whereupon the mass ...
متن کاملDebris 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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We have carried out a high-sensitivity search for circumstellar disks around Herbig Be stars in the continuum at 1.4mm and 2.7mm using the IRAM interferometer at the Plateau de Bure (PdBI) . In this letter, we report data on three well studied B0 stars, MWC 1080, MWC 137 and R Mon. The two latter have also been observed in the continuum at 0.7 cm and 1.3 cm using the NRAO Very Large Array (VLA)...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2006
ISSN: 0004-637X,1538-4357
DOI: 10.1086/498093