论文标题
IRAS碎片磁盘的明智视图：修改灰尘特性
A WISE View of IRAS Debris Disks: Revising the Dust Properties
论文作者
论文摘要
恒星周围的碎屑被认为是行星系统的组成部分。限制这些磁盘的尘埃特性可以为行星系统的形成和演变提供至关重要的信息。作为一项全天空调查，\ textit {红外天文卫星}（\ iras）为发现了第一个碎屑磁盘宿主星（VEGA）的碎屑磁盘搜索做出了巨大贡献。 Rhee \ citep {Rhe07}发表的\ IRAS检测的碎屑盘样品包含146颗恒星，并具有灰尘性能的详细信息。虽然由于\ iras \ database的限制，但仍无法确定其中45个的灰尘特性（仅在60 $μ$ m处具有\ iras \检测）。因此，使用\ textit {宽田红外调查Explorer}（\ wise）的更多灵敏度数据，我们可以更好地表征样本星：对于只有60 $μ$ m的恒星，我们仅适用于过多的磁通量，并获得灰尘温度和粉尘温度和分数亮度；对于带有多波段\ iras \检测的其余恒星，修改了灰尘特性，这表明尘埃温度以前在高温带中过度估计。此外，我们在\ Wise \ 22 $μ$ M处识别出17颗恒星，其距离地球的距离分布较小，而没有中型过量发射的其他恒星的分数较小，而分数亮度较高。其中，可以在以前的作品中找到15星。
Debris disks around stars are considered as components of planetary systems. Constrain the dust properties of these disks can give crucial information to formation and evolution of planetary systems. As an all-sky survey, \textit{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 \citep{rhe07} contains 146 stars with detailed information of dust properties. While the dust properties of 45 of them still can not be determined due to the limitations with the \iras\ database (have \iras\ detection at 60 $μ$m only). Therefore, using more sensitivity data of \textit{Wide-field Infrared Survey Explorer} (\wise), we can better characterize the sample stars: For the stars with \iras\ detection at 60 $μ$m 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 over estimated in high temperatures band before. Moreover, we identify 17 stars with excesses at the \wise\ 22 $μ$m 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.
