论文标题
普朗克中级结果。 LV。紧凑型源第二普朗克目录中高频源的可靠性和热性能
Planck intermediate results. LV. Reliability and thermal properties of high-frequency sources in the Second Planck Catalogue of Compact Sources
论文作者
论文摘要
我们描述了使用新的多波段贝叶斯提取和估算软件包(BEEP)生产的最新版本的Planck Planck目录(PCCS2)的扩展。哔哔声假设PCCS2中存在的紧凑源在857 GHz时具有类似粉尘的光谱能量分布,从而导致在较低和较高频率下排放,并调整源的参数及其SED,以适合Planck在Planck的三个最高频率通道中在353、545、545、557 GHz和857 GHz和85000 ghz中观察到的排放。为了减少有关弥漫性卷心发射的混淆,蜂鸣声的数据模型包括围绕每个源的背景发射的描述,并根据背景发射的空间分布的统计特性来调整源参数提取的置信度。蜂鸣器为每个来源产生以下三组参数:(a)适合源的修改后的黑体(MBB)热发射模型; (b)在考虑每个频率下的SED独立源通量密度; (c)适合嵌入源的背景的MBB模型。哔哔声还计算每个源的可靠性参数,该参数考虑到由于周围的卷心菜而引起的混乱。我们定义了一个高可靠性子集(蜂鸣/基础),其中包含26个083来源(占PCCS2总目录的54.1%),其中大多数没有有关PCCS2可靠性的信息。 PCCS2的哔哔声扩展的结果是通过PLA公开获得的,它将能够研究紧凑的银河系和半乳酸尘土飞扬的良好定义样品的热性能。
We describe an extension of the most recent version of the Planck Catalogue of Compact Sources (PCCS2), produced using a new multi-band Bayesian Extraction and Estimation Package (BeeP). BeeP assumes that the compact sources present in PCCS2 at 857 GHz have a dust-like spectral energy distribution, which leads to emission at both lower and higher frequencies, and adjusts the parameters of the source and its SED to fit the emission observed in Planck's three highest frequency channels at 353, 545, and 857 GHz, as well as the IRIS map at 3000 GHz. In order to reduce confusion regarding diffuse cirrus emission, BeeP's data model includes a description of the background emission surrounding each source, and it adjusts the confidence in the source parameter extraction based on the statistical properties of the spatial distribution of the background emission. BeeP produces the following three new sets of parameters for each source: (a) fits to a modified blackbody (MBB) thermal emission model of the source; (b) SED-independent source flux densities at each frequency considered; and (c) fits to an MBB model of the background in which the source is embedded. BeeP also calculates, for each source, a reliability parameter, which takes into account confusion due to the surrounding cirrus. We define a high-reliability subset (BeeP/base), containing 26 083 sources (54.1 per cent of the total PCCS2 catalogue), the majority of which have no information on reliability in the PCCS2. The results of the BeeP extension of PCCS2, which are made publicly available via the PLA, will enable the study of the thermal properties of well-defined samples of compact Galactic and extra-galactic dusty sources.