The Spitzer Infrared Spectrograph Debris Disk Catalog. I. Continuum Analysis of Unresolved Targets

摘要: During the Spitzer Space Telescope cryogenic mission, Guaranteed Time Observers, Legacy Teams, and General Observers obtained Infrared Spectrograph (IRS) observations of hundreds debris disk candidates. We calibrated spectra 571 candidates, including 64 new IRAS Multiband Imaging Photometer for (MIPS) disks modeled their stellar photospheres, produced a catalog excess unresolved disks. For 499 targets with IRS but without strong spectral features (and subset 420 additional MIPS 70 μm observations), we data) assuming that dust thermal emission was well-described using either one- or two-temperature blackbody model. calculated probability each model computed average to select among models. found energy distributions majority objects (~66%) were better described warm (T gr ~ 100-500 K) cold 50-150 populations analogous zodiacal Kuiper Belt dust, suggesting planetary systems are common in is around host stars ages up ~1 Gyr. younger generally have larger fractional infrared luminosities higher grain temperatures higher-mass temperatures. show increasing distance inconsistent self-stirred models, expected if these possess planets at 30-150 AU. Finally, illustrate how may be used constrain radial dependence material minimum mass solar nebula.