MIGHTEE：MIGHTEE连续谱数据发布1中射电源的宿主星系相关目录
MIGHTEE: The Host-Galaxy Associated Catalogue of the Radio Sources in MIGHTEE Continuum Data Release 1
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中文总结 AI 辅助
该研究针对MIGHTEE连续谱数据发布1，结合统计交叉匹配和目视检查等方法，识别宿主星系对应体并合并射电成分，得到约66000个源的目录，给出源红移分布预期，与相关结果大致相符，为研究射电源属性及演化提供了重要数据。
中文摘要 AI 辅助
射电连续谱巡天提供了高红移的活动星系核（AGN）和恒星形成星系（SFG）样本，不受尘埃遮蔽偏差影响。但射电探测源需要多波段对应体来了解其固有属性及研究恒星形成和AGN活动的演化。本文给出了MeerKAT国际GHz分层河外探索（MIGHTEE）巡天连续谱数据发布1中在最佳辅助数据区域（共7.5平方度）的宿主星系对应体。通过统计交叉匹配和目视检查识别Ks波段选定的宿主星系，必要时将多个射电成分合并为单个物理对象。得到约66000个源的组合射电目录，COSMOS场中约95%、XMM-LSS中约91%、CDFS-DEEP中约90%的源有宿主对应体和红移信息，COSMOS场中有相当一部分源有光谱红移。利用交叉匹配目录，基于射电光度与宿主恒星形成率的比较初步识别射电过剩和恒星形成星系，并给出这些源红移分布的预期，与深度射电光度函数和模拟目录结果大致相符。
英文摘要
Radio continuum surveys provide samples of active galactic nuclei (AGN) and star forming galaxies (SFGs) to high redshifts, free of biases due to dust obscuration. However, radio detected sources require multi-wavelength counterparts to understand their intrinsic properties (e.g. redshift, stellar mass) and to study the evolution of star formation and AGN activity. In this work we present host galaxy counterparts for the MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) survey continuum Data Release 1 in regions with the best ancillary data (totalling 7.5 sq. deg). We combine statistical cross-matching and visual inspection to identify Ks-band selected host galaxies, and additionally combine multiple radio components into single physical objects, where needed. This results in a combined radio catalogue of ~66 000 sources, with host counterparts and redshifts identified for ~95 per cent of sources in the COSMOS field, ~91 per cent in XMM-LSS and ~90 per cent in CDFS-DEEP. This includes a significant fraction of sources with spectroscopic redshifts within the COSMOS field (~50 per cent), with ~30 and ~20 per cent in the XMM-LSS and CDFS-DEEP fields respectively. Using the cross-matched catalogue, we make an initial identification of radio-excess and star forming galaxies based on comparisons of the radio luminosities to host star formation rates. Using this split as a proxy for radio loud AGN or SFGs, we present expectations for the redshift distributions of these sources, finding broad agreement with those from deep radio luminosity functions and simulated catalogues.
