A WISE view of IRAS debris disks: revising the dust properties  

作　　者：Qiong Liu 

机构地区：[1]Department of Physics,Guizhou University,Guiyang 550025,China

出　　处：《Research in Astronomy and Astrophysics》2021年第3期86-96,共11页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.U1631109);based on the sample of Rhee and makes use of data products from many telescopes:WISE(a joint project of the University of California,Los Angeles;the Jet Propulsion Laboratory/California Institute of Technology);Hipparcos(the primary result of the Hipparcos space astrometry mission,undertaken by the European Space Agency)and 2MASS(a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology)。

摘　　要：Debris disks around stars are considered as components of planetary systems.Constraining the dust properties of these disks can give crucial information to formation and evolution of planetary systems.As an all-sky survey,InfRared Astronomical Satellite(IRAS)gave great contribution to the debris disk searching which discovered the first debris disk host star(Vega).The IRAS-detected debris disk sample published by Rhee(Rhee et al.2007)contains 146 stars with detailed information of dust properties.While the dust properties of 45 of them still cannot be determined due to the limitations with the IRAS database(have IRAS detection at 60μm only).Therefore,using more sensitivity data of Wide-.field Infrared Survey Explorer(WISE),we can better characterize the sample stars:for the stars with IRAS detection at 60μm only,we refit the excessive flux densities and obtain the dust temperatures and fractional luminosities;while for the remaining stars with multi-bands IRAS detections,the dust properties are revised which show that the dust temperatures were overestimated in the high temperature band before.Moreover,we identify 17 stars with excesses at the WISE 22μm which have smaller distribution of distance from Earth and higher fractional luminosities than the other stars without mid-infrared excess emission.Among them,15 stars can be found in previous works.

关 键 词：(stars:)circumstellar matter protoplanetary disks infrared:stars 

分 类 号：P14[天文地球—天体物理]