标题： 围绕类似太阳恒星的 debris 盘的毫米波分辨率观测 显示英文标题

标题： Resolved Millimeter-Wavelength Observations of Debris Disks around Solar-Type Stars

摘要： 年轻主序星周围存在尘埃盘，这暗示了行星系统的存在及其结构。 毫米波观测探测到能够追踪星子带位置的大颗粒。 FEPS（行星系统形成与演化）$Spitzer$恒星邻近年轻太阳系类比的遗产巡天得到了五个具有适合干涉后续观测的毫米波流量的尘埃盘宿主恒星样本。 我们展示了用亚毫米阵列（SMA）和用于毫米波天文学研究的组合阵列（CARMA）在约2"分辨率下的观测，这些观测在空间上解析了这些附近（$d\sim$50 pc）恒星周围的尘埃盘。 其中五个盘中的两个（HD 377、HD 8907）首次被空间分辨，另一个（HD 104860）首次在毫米波长上被分辨。 我们将我们的新观测与档案SMA和阿塔卡马大型毫米/亚毫米阵列（ALMA）数据相结合，以实现对全部五个目标样本的一致分析。 我们同时对宽频光度数据和分辨率后的毫米波可见度进行建模，以限制尘埃温度和盘形态，并执行MCMC分析以拟合基本结构参数。 我们发现冷外环的半径和宽度表现出与太阳系柯伊伯带放大版本一致的特性。 所有盘都显示出与吹散尺寸相当的特征颗粒大小，且所有大尘粒发射的解析观测结果在不确定性范围内均与轴对称尘埃分布一致。 这些结果与在红外波段进行的可比较研究一致。 显示英文摘要

摘要： The presence of debris disks around young main sequence stars hints at the existence and structure of planetary systems. Millimeter-wavelength observations probe large grains that trace the location of planetesimal belts. The FEPS (Formation and Evolution of Planetary Systems) $Spitzer$ Legacy survey of nearby young solar analogues yielded a sample of five debris disk-hosting stars with millimeter flux suitable for interferometric follow-up. We present observations with the Submillimeter Array (SMA) and the Combined Array for Research in Millimeter-wave Astronomy (CARMA) at ~2" resolution that spatially resolve the debris disks around these nearby ($d\sim$50 pc) stars. Two of the five disks (HD 377, HD 8907) are spatially resolved for the first time and one (HD 104860) is resolved at millimeter wavelengths for the first time. We combine our new observations with archival SMA and Atacama Large Millimeter/Submillimeter Array (ALMA) data to enable a uniform analysis of the full five-object sample. We simultaneously model the broad-band photometric data and resolved millimeter visibilities to constrain the dust temperatures and disk morphologies, and perform an MCMC analysis to fit for basic structural parameters. We find that the radii and widths of the cold outer belts exhibit properties consistent with scaled-up versions of the Solar System's Kuiper Belt. All the disks exhibit characteristic grain sizes comparable to the blowout size, and all the resolved observations of emission from large dust grains are consistent with an axisymmetric dust distribution to within the uncertainties. These results are consistent with comparable studies carried out at infrared wavelengths.