The Morphologies and Lifetimes of Transitional Protoplanetary Disks
The Morphologies and Lifetimes of Transitional Protoplanetary Disks
复制标题
过渡原行星盘的形态和寿命
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
T. Currie
中科院分区：
文献类型：
--
作者：
T. Currie
我描述了新的约束的寿命和形态的过渡原行星盘的观测1- 10万年的老恒星与\textit{斯皮策太空望远镜}。斯皮策的新结果清楚地表明了两种过渡盘的证据，因此有两种主要的盘进化途径：形成内部孔/间隙并从内向外清除的盘和更同源地耗尽的盘。对1 ~ 1000万年前的星系团如金牛座、IC 348、NGC 2362和Cha的盘族分析表明，过渡盘的平均寿命一定是原行星盘平均寿命的一个可观的部分：300 ~ 500万年中约有100万年。过渡磁盘SED的种类以及与其他磁盘诊断的相关性与负责清除磁盘的多种机制一致。
I describe new constraints on the lifetimes and morphologies of transitional protoplanetary disks from observations of 1--10 Myr old stars with the \textit{Spitzer Space Telescope}. New Spitzer results clearly show evidence for two kinds of transitional disks and thus two main disk evolutionary pathways: disks which form an inner hole/gap and clear from the inside out and disks that deplete more homologously. Analyzing the disk populations of 1--10 Myr old clusters such as Taurus, IC 348, NGC 2362, and $\eta$ Cha show that the mean transitional disk lifetime must be an appreciable fraction of the mean protoplanetary disk lifetime: $\approx$ 1 Myr out of 3--5 Myr. The varieties of transitional disk SEDs and correlations with other disk diagnostics are consistent with multiple mechanisms responsible for clearing disks.