MALS-NOT：为MeerKAT吸收线巡天识别射电亮类星体
MALS-NOT: Identifying Radio-Bright Quasars for the MeerKAT Absorption Line Survey
摘要：
我们提出了一个预备光谱调查，以确定无线电明亮，高红移类星体的MeerKAT吸收线调查（MALS）。候选者是根据1.4 GHz（>200 mJy）的单一通量密度极限以及宽视场红外巡天探测器（WISE）的中红外颜色标准选定的。通过使用北欧光学望远镜的光谱观测，我们从99个候选目标中识别出72个类星体。我们测量光谱红移的基础上的特征，广泛的发射线存在于光谱。在这72个类星体中，有64个和48个物体的红移足够高（z>0.6和z>1.4），可用于与南非的平方公里阵列（SKA）前体MeerKAT进行L波段和UHF波段光谱跟踪。
英文摘要：
We present a preparatory spectroscopic survey to identify radio-bright, high-redshift quasars for the MeerKAT Absorption Line Survey (MALS). The candidates have been selected on the basis of a single flux density limit at 1.4 GHz (>200 mJy) together with mid-infrared color criteria from the Wide-field Infrared Survey Explorer (WISE). Through spectroscopic observations using the Nordic Optical Telescope, we identify 72 quasars out of 99 candidates targeted. We measure the spectroscopic redshifts based on characteristic, broad emission lines present in the spectra. Of these 72 quasars, 64 and 48 objects are at sufficiently high redshift (z>0.6 and z>1.4) to be used for the L-band and UHF-band spectroscopic follow-up with the Square Kilometre Array (SKA) precursor in South Africa: the MeerKAT.
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