Title: The Co-Ordinated Radio and Infrared Survey for High-Mass Star Formation. V. The CORNISH-South Survey and Catalogue Show Chinese title

Title: 协调的射电和红外高恒星形成巡天。 第五章：CORNISH-South巡天与目录

Abstract: We present the first high spatial resolution radio continuum survey of the southern Galactic plane. The CORNISH project has mapped the region defined by $295^{\circ} < l < 350^{\circ}$; $|b| < 1^{\circ}$ at 5.5-GHz, with a resolution of 2.5$^{''}$ (FWHM). As with the CORNISH-North survey, this is designed to primarily provide matching radio data to the Spitzer GLIMPSE survey region. The CORNISH-South survey achieved a root mean square noise level of $\sim$ 0.11 mJy beam$^{-1}$, using the 6A configuration of the Australia Telescope Compact Array (ATCA). In this paper, we discuss the observations, data processing and measurements of the source properties. Above a 7$\sigma$ detection limit, 4701 sources were detected, and their ensemble properties show similar distributions with their northern counterparts. The catalogue is highly reliable and is complete to 90 per cent at a flux density level of 1.1 mJy. We developed a new way of measuring the integrated flux densities and angular sizes of non-Gaussian sources. The catalogue primarily provides positions, flux density measurements and angular sizes. All sources with IR counterparts at 8$\mu m$ have been visually classified, utilizing additional imaging data from optical, near-IR, mid-IR, far-IR and sub-millimetre galactic plane surveys. This has resulted in the detection of 524 H II regions of which 255 are ultra-compact H II regions, 287 planetary nebulae, 79 radio stars and 6 massive young stellar objects. The rest of the sources are likely to be extra-galactic. These data are particularly important in the characterization and population studies of compact ionized sources such as UCHII regions and PNe towards the Galactic mid-plane. Show Chinese abstract

Abstract: 我们介绍了对南部银河平面的首个高空间分辨率射电连续谱巡天。CORNISH 项目以 5.5 GHz 的频率对该区域进行了测绘，分辨率为 2.5$^{''}$（全宽半最大值），该区域由$295^{\circ} < l < 350^{\circ}$和$|b| < 1^{\circ}$定义。与CORNISH北方巡天一样，这项研究的主要目的是为斯皮策GLIMPSE巡天区域提供匹配的射电数据。CORNISH南方巡天达到了根均方噪声水平$\sim$ 0.11 毫焦耳/波束$^{-1}$，使用的是澳大利亚望远镜紧凑阵列（ATCA）的6A配置。本文讨论了观测、数据处理和源属性测量。在超过 7$\sigma$的检测限之上，检测到了 4701 个源，它们的整体属性与其北部对应物表现出相似的分布。该目录非常可靠，在 1.1 毫焦耳/波束的流量密度水平上完成了 90%。我们开发了一种新的方法来测量非高斯源的积分流量密度和角大小。目录主要提供了位置、流量密度测量和角大小信息。所有在 8$\mu m$有红外对应体的源都通过光学、近红外、中红外、远红外和亚毫米银河平面巡天的附加成像数据进行了视觉分类。这导致检测到 524 个 H II 区域，其中 255 个是超紧致 H II 区域，287 个行星状星云，79 个射电恒星和 6 个大质量年轻恒星。其余的源很可能是河外源。这些数据对于描述和研究诸如UHII区和PNe等紧凑电离源，特别是在银河系中平面附近的源尤其重要。