文章基本信息

标题：The Statistics of Extended Debris Disks Measured with Gaia and Planck
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作者：Jacob Nibauer ; Eric Baxter ; Bhuvnesh Jain 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2020
卷号：159
期号：5
页码：2898-2915
DOI：10.3847/1538-3881/ab8192
语种：English
出版社：American Institute of Physics
摘要：Thermal emission from debris disks around stars has been measured using targeted and resolved observations.We present an alternative likelihood-based approach in which temperature maps from the Planck cosmic microwave background (CMB) survey at 857 and 545 GHz are analyzed in conjunction with stellar positions from Gaia to estimate the fraction of stars hosting disks and the thermal emission from the disks.The debris disks are not resolved (or even necessarily detected individually), but their statistical properties and the correlations with stellar properties are measured for several thousand stars.We compare our findings with higher sensitivity surveys of smaller samples of stars.For dimmer stars, in particular K and M dwarfs, we find that about 10% of stars within 80 pc have emission consistent with debris disks.We also report on 80 candidate disks, the majority of which are not previously identified.We have previously constrained the properties of Exo-Oort clouds using Planck data—with future CMB surveys, both components can be measured for different stellar types, providing a new avenue to study the outer parts of planetary systems.
关键词：Debris disks;Circumstellar disks;Cosmic background radiation;Submillimeter astronomy