%0 Generic %1 jolicoeur2020detecting %A Jolicoeur, Sheean %A Maartens, Roy %A De Weerd, Eline M. %A Umeh, Obinna %A Clarkson, Chris %A Camera, Stefano %D 2020 %K library %T Detecting the relativistic bispectrum in 21cm intensity maps %U http://arxiv.org/abs/2009.06197 %X We investigate the detectability of leading-order relativistic effects in the bispectrum of future 21cm intensity mapping surveys. The relativistic signal arises from Doppler and other line-of-sight effects in redshift space. In the power spectrum of a single tracer, these effects are suppressed by a factor $\cH^2/k^2$. By contrast, in the bispectrum the relativistic signal couples to short-scale modes, leading to an imaginary contribution that scales as $\cH/k$, thus increasing the possibility of detection. Previous work has shown that this relativistic signal is detectable in a Stage IV H$\alpha$ galaxy survey. We show that the signal is also detectable by next-generation 21cm intensity maps, but typically with a lower signal-to-noise, due to foreground and telescope beam effects.

@misc{jolicoeur2020detecting, abstract = {We investigate the detectability of leading-order relativistic effects in the bispectrum of future 21cm intensity mapping surveys. The relativistic signal arises from Doppler and other line-of-sight effects in redshift space. In the power spectrum of a single tracer, these effects are suppressed by a factor $\cH^2/k^2$. By contrast, in the bispectrum the relativistic signal couples to short-scale modes, leading to an imaginary contribution that scales as $\cH/k$, thus increasing the possibility of detection. Previous work has shown that this relativistic signal is detectable in a Stage IV H$\alpha$ galaxy survey. We show that the signal is also detectable by next-generation 21cm intensity maps, but typically with a lower signal-to-noise, due to foreground and telescope beam effects.}, added-at = {2020-09-15T05:52:20.000+0200}, author = {Jolicoeur, Sheean and Maartens, Roy and De Weerd, Eline M. and Umeh, Obinna and Clarkson, Chris and Camera, Stefano}, biburl = {https://www.bibsonomy.org/bibtex/2133b0fdfa5681e74a9c6801591b671dc/gpkulkarni}, description = {Detecting the relativistic bispectrum in 21cm intensity maps}, interhash = {80bc1e7d526cf6b2c15a0a653df2ac37}, intrahash = {133b0fdfa5681e74a9c6801591b671dc}, keywords = {library}, note = {cite arxiv:2009.06197Comment: 17 pages, 8 figures}, timestamp = {2020-09-15T05:52:20.000+0200}, title = {Detecting the relativistic bispectrum in 21cm intensity maps}, url = {http://arxiv.org/abs/2009.06197}, year = 2020 }