论文标题
Subaru超级摄像机和不明智的星系的光度红移以及已识别星系簇的目录
Photometric redshifts for galaxies in the Subaru Hyper Suprime-Cam and unWISE and a catalogue of identified clusters of galaxies
论文作者
论文摘要
我们首先提供了168万个星系的光度红移目录，该星系是从超级Suprime-CAM Subaru策略计划的7频段光度数据中得出的，并使用最近的neighbour算法进行了广泛的红外红外调查探索器。 z <0.7的星系的红移不确定性约为0.024，在z〜2时红移稳定增加到约0.11。从如此大的数据集中，我们确定了21,661个星系簇，其中5537个簇具有红移Z> 1和642个簇具有Z> 1.5，从而显着扩大了星系簇的高红移样品。估计簇的丰富度和质量，这些簇的等效质量为m_ {500}> 0.7*10^{14} msun。我们发现，每个丰富度垃圾箱中最亮星系星系（BCG）的恒星质量不会随红移而显着发展。恒星形成BCG的比例随红移而增加，但不取决于簇质量。
We first present a catalogue of photometric redshifts for 14.68 million galaxies derived from the 7-band photometric data of Hyper Suprime-Cam Subaru Strategic Program and the Wide-field Infrared Survey Explorer using the nearest-neighbour algorithm. The redshift uncertainty is about 0.024 for galaxies of z<0.7, and steadily increases with redshift to about 0.11 at z~2. From such a large data set, we identify 21,661 clusters of galaxies, among which 5537 clusters have redshifts z>1 and 642 clusters have z>1.5, significantly enlarging the high redshift sample of galaxy clusters. Cluster richness and mass are estimated, and these clusters have an equivalent mass of M_{500} > 0.7*10^{14} Msun. We find that the stellar mass of the brightest cluster galaxies (BCGs) in each richness bin does not significantly evolve with redshift. The fraction of star-forming BCGs increases with redshift, but does not depend on cluster mass.
