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- W1748302912 abstract "The Two-Micron All-Sky Survey (2MASS) has mapped out the low-redshift Universe down to $K_Ssim14$ mag. As its near-infrared photometry primarily probes the featureless Rayleigh-Jeans tail of galaxy spectral energy distributions, colour-based redshift estimation is rather uninformative. Until now, redshift estimates for this dataset have relied on optical follow-up suffering from selection biases. Here we use the newly-developed technique of clustering-based redshift estimation to infer the redshift distribution of the 2MASS sources regardless of their optical properties. We characterise redshift distributions of objects from the Extended Source Catalogue as a function of near-infrared colours and brightness and report some observed trends. We also apply the clustering redshift technique to dropout populations, sources with non-detections in one or more near-infrared bands, and present their redshift distributions. Combining all extended sources, we confirm with clustering redshifts that the distribution of this sample extends up to $zsim0.35$. % We perform a similar analysis with the Point Source Catalogue and show that it can be separated into stellar and extragalactic contributions with galaxies reaching $zsim0.7$. We estimate that the Point Source Catalogue contains 1.6 million extragalactic objects: as many as in the Extended Source Catalogue but probing a cosmic volume ten times larger." @default.
- W1748302912 created "2016-06-24" @default.
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- W1748302912 date "2016-02-02" @default.
- W1748302912 modified "2023-10-16" @default.
- W1748302912 title "Exploring the 2MASS extended and point source catalogues with clustering redshifts" @default.
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- W1748302912 doi "https://doi.org/10.1093/mnras/stw256" @default.
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