Jarvis, MattFialkov, AnastasiaRBarkana, ennan2021-02-152021-02-152019Jarvis, M. et al. (2019). Extracting the global signal from 21-cm fluctuations: the multitracer approach. Monthly Notices of the Royal Astronomical Society, 491(3), 3108–31191365-2966https://doi.org/10.1093/mnras/stz3208http://hdl.handle.net/10566/5917The multitracer technique employs a ratio of densities of two differently biased galaxy samples that trace the same underlying matter density field, and was proposed to alleviate the cosmic variance problem. Here, we propose a novel application of this approach, applying it to two different tracers one of which is the 21-cm signal of neutral hydrogen from the epochs of reionization and comic dawn.enGalaxies: high redshiftCosmology: theoryDark agesReionizationFirst starsArticle